Vomiting

Vomiting Symptoms & Signs

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Symptoms & Signs

Vomiting, along with nausea, is a symptom of an underlying disease rather than a specific illness itself. Emesis is the medical term for vomiting. Vomiting is the forcible emptying of the stomach in which the stomach has to overcome the pressures that are normally in place to keep food and secretions within the stomach. Causes of vomiting are varied and include food-borne illnesses (food poisoning), infections, problems with the brain and central nervous system, and systemic (body-wide) diseases. Some illnesses will cause nausea and vomiting, even though there is no direct involvement of the stomach or gastrointestinal tract. Examples can include pneumonia, heart attack, and sepsis. Vomiting may be a side effect of medications, including drugs used in cancer chemotherapy, as well as a side effect of radiation therapy.

Medically Reviewed by a Doctor on 9/7/2017

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REFERENCE:

Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.

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      • What are secondary headaches?
      • What are cranial neuralgias, facial pain, and other headaches?
      • 17 types of headaches
      • What causes headaches?
      • What causes tension headaches?
      • What are the signs and symptoms of tension headaches?
      • How are tension headaches diagnosed?
      • How are tension headaches treated?
      • What causes cluster headaches?
      • What are the symptoms of cluster headaches?
      • How are cluster headaches diagnosed?
      • How are cluster headaches treated?
      • Can cluster headaches be prevented?
      • What diseases cause secondary headaches?
      • How are secondary headaches diagnosed?
      • What are the exams and tests for secondary headaches?
      • When should I seek medical care for a headache?
      • How do you get rid of a headache? Are home remedies effective for headaches?
    • Heart Attack Heart attack happens when a blood clot completely obstructs a coronary artery supplying blood to the heart muscle. A heart attack...learn more »
      In This Article
      Heart Attack Article
      • Heart attack facts
      • What is a heart attack?
      • What causes a heart attack?
      • What are the symptoms of a heart attack?
      • What are the complications of a heart attack?
      • What are the risk factors for atherosclerosis and heart attack?
      • How to diagnose a heart attack
      • What is the treatment for heart attack?
      • What are the risk factors for heart attack in women?
      • What are the symptoms of heart attack in women and how is heart attack diagnosed?
      • How is heart attack in women treated?
      • What about hormone therapy and heart attack in women?
      • What is new in heart attack?
    • Heat-Related Illness Hyperthermia is the overheating of the body. Heat-related illnesses, all hyperthermia conditions, include: heat stroke,...learn more »
      In This Article
      Heat-Related Illness Article
      • Heat-related illness (hyperthermia) facts
      • What is a heat-related illness?
      • What causes a heat-related illness?
      • Who is at risk of heat-related illness?
      • What are the symptoms of heat-related illness?
      • Heat stroke
      • Heat cramps
      • Heat exhaustion
      • Heat syncope (fainting)
      • Heat rash
      • Heat-related illness prevention
    • Hepatitis B (HBV, Hep B) The hepatitis B virus (HBV, hep B) is a unique, coated DNA virus belonging to the Hepadnaviridae family of viruses. The course of...learn more »
      In This Article
      Hepatitis B (HBV, Hep B) Article
      • Hepatitis B facts
      • What is hepatitis?
      • How is the hepatitis B virus spread (transmitted)?
      • What are the symptoms of acute hepatitis B?
      • What are the symptoms of chronic hepatitis B?
      • How is hepatitis B diagnosed?
      • What is the role of a liver biopsy in chronic hepatitis B?
      • What is the natural course of chronic hepatitis B?
      • What medications are used to treat hepatitis B?
      • What are the effects of alcohol on hepatitis B?
      • What are the effects of immunosuppressive medications on hepatitis B?
      • What is delta hepatitis?
      • What about co-infection with hepatitis B virus and hepatitis C virus?
      • What happens in co-infection with hepatitis B virus and HIV?
      • What is the role of liver transplantation in hepatitis B?
      • What can be done to prevent hepatitis B?
      • What is new in the treatment of hepatitis B?
    • Hepatitis C (HCV, Hep C) Hepatitis C is an inflammation of the liver due to the hepatitis C virus (HCV), which is usually spread by blood transfusion,...learn more »
      In This Article
      Hepatitis C (HCV, Hep C) Article
      • Hepatitis C infection (HCV) facts
      • What is hepatitis C infection, and how many people are infected?
      • What is the hepatitis C virus?
      • What are the symptoms of hepatitis C infection?
      • What is the contagious period for hepatitis C?
      • What is the incubation period for hepatitis C?
      • How long does it take for symptoms to appear after contracting hepatitis C?
      • How is hepatitis C spread?
      • Can hepatitis C infection affect other organs besides the liver?
      • Who is at high risk and should be tested for hepatitis C infection?
      • What type of doctor treats hepatitis C?
      • How is hepatitis C diagnosed?
      • Liver biopsy and non-invasive tests for hepatitis C
      • What medications cure hepatitis C infection?
      • What are the treatment guidelines for hepatitis C?
      • What is the treatment for people with acute hepatitis C infection?
      • What are the side effects of treatments for hepatitis C infection?
      • What about liver transplantation for a person with hepatitis C?
      • How is monitoring done after treatment for hepatitis C?
      • What home remedies are available for hepatitis C?
      • What are the complications of undiagnosed hepatitis C?
      • Can hepatitis C be prevented?
      • What is the prognosis of hepatitis C?
      • What is the current research and what is in the future for hepatitis C?
    • Hereditary Angioedema (HAE) Hereditary angioedema or HAE is a genetic disease that causes swelling of the skin and tissues beneath it. Symptoms of HAE...learn more »
      In This Article
      Hereditary Angioedema (HAE) Article
      • Hereditary angioedema (HAE) definition and facts:
      • What is hereditary angioedema (HAE)?
      • What are the symptoms of hereditary angioedema (HAE)?
      • What are the types or forms of hereditary angioedema (HAE)?
      • What causes hereditary angioedema (HAE)?
      • What triggers hereditary angioedema (HAE)?
      • What about pregnancy and hereditary angioedema (HAE)?
      • Which specialties of doctors treat hereditary angioedema (HAE)?
      • How is hereditary angioedema (HAE) diagnosed?
      • What are the treatment guidelines for hereditary angioedema (HAE)?
      • How can a person with hereditary angioedema (HAE) avoid triggers and manage the disease?
      • Tips for managing and living with hereditary angioedema (HAE)
      • What are the complications of hereditary angioedema (HAE)?
      • What is the prognosis for a person with hereditary angioedema (HAE)?
    • Hernia A hernia occurs when an organ or piece of tissue protrudes from the space in which it is normally contained. Symptoms of a hernia...learn more »
      In This Article
      Hernia Article
      • What is an abdominal hernia?
      • What are the different types of abdominal hernias?
      • What causes an abdominal hernia?
      • What are the risk factors for a hernia?
      • What are the signs and symptoms of an abdominal hernia?
      • What types of medical professionals treat and repair hernias?
      • How do health care professionals diagnose abdominal hernias?
      • What types of surgery repair an abdominal hernia?
      • What non-surgical treatments are available for an abdominal hernia?
      • What are hernia complications?
      • What is the prognosis for an abdominal hernia?
      • Is it possible to prevent an abdominal hernia?
    • How Long Is a Cold or Flu Contagious? Viruses cause the common cold and the flu. Early symptoms and signs for a cold and the flu are similar, however, flu symptoms are...learn more »
      In This Article
      How Long Is a Cold or Flu Contagious? Article
      • How long is a cold or flu contagious?
      • How will I know if I have a cold or the flu?
      • How do cold and flu viruses spread?
      • How will I know if I am cured of the flu or a cold?
      • When should someone seek medical care for a cold or the flu?
    • Insect Sting Allergies The majority of stinging insects in the United States are from bees, yellow jackets, hornets, wasps, and fire ants. Severity of...learn more »
      In This Article
      Insect Sting Allergies Article
      • Stinging insect allergy facts
      • What are stinging insects?
      • What types of insect sting reactions occur?
      • What are signs and symptoms of insect sting allergies?
      • Who is at risk for insect sting allergies?
      • What tests do doctors use to diagnose an insect sting allergy?
      • What specialists treat insect sting allergies?
      • What is the treatment for a severe allergic reaction?
      • Are there home remedies for insect sting allergies?
      • How can I avoid insect stings?
      • What can I do about becoming immune to insect allergy?
      • What is the prognosis for an insect sting allergy?
    • Intussusception Intussusception is the telescoping (prolapse) of a portion of the intestine within another immediately adjacent portion of...learn more »
      In This Article
      Intussusception Article
      • Intussusception facts
      • What is intussusception?
      • What happens during intussusception?
      • Is intussusception an urgent problem?
      • Who is at greatest risk for intussusception?
      • What causes intussusception?
      • Why is rapid diagnosis of intussusception important?
      • What are the symptoms of intussusception?
      • How is intussusception diagnosed?
      • Is it necessary to operate when there is intussusception?
      • What is the prognosis (outlook) for patients with intussusception?
    • Is Cholera Contagious? Cholera is an infectious disease caused by the bacteria Vibrio cholerae. It's typically transmitted via infected fecal matter....learn more »
      In This Article
      Is Cholera Contagious? Article
      • What is cholera?
      • Is cholera contagious?
      • What is the incubation period for cholera?
      • How is cholera spread?
      • When does the contagious period for cholera end?
      • When should someone seek medical care for cholera?
    • Is Crohn's Disease Contagious? Crohn's disease, a form of inflammatory bowel disease (IBD), and is characterized by symptoms and signs that...learn more »
      In This Article
      Is Crohn's Disease Contagious? Article
      • What is Crohn's disease?
      • Is Crohn's disease contagious?
      • How would I know if I have Crohn's disease?
      • How does someone get Crohn's disease?
      • How will I know if I'm cured of Crohn's disease?
      • When should I contact a medical caregiver about Crohn's disease?
    • Is H. pylori Contagious? H. pylori (Helicobacter pylori) infection: Is it contagious? H. pylori infection is caused by fecal contamination in either food...learn more »
      In This Article
      Is H. pylori Contagious? Article
      • What is H. pylori?
      • Is H. pylori contagious?
      • How long before I know I am infected with H. pylori?
      • What are the symptoms of H. pylori?
      • How are H. pylori bacteria spread?
      • When should I seek medical care for an H. pylori infection?
      • Are there home remedies or cures for H. pylori infection?
      • How will I know if or others or I are no longer contagious for H. pylori?
    • Is Malaria Contagious? Malaria is transmitted via the bite of an infected mosquito. The incubation period for malaria depends upon the species of...learn more »
      In This Article
      Is Malaria Contagious? Article
      • What is malaria?
      • Is malaria contagious?
      • What is the incubation period for malaria?
      • How is malaria transmitted?
      • How long does malaria last, and how long will it take to be cured of malaria?
      • When should people seek medical care for a suspected malaria infection?
    • Is Meningitis Contagious? Meningitis, inflammation of the meninges, symptoms and signs include neck stiffness, headache, and fever. There are five types of...learn more »
      In This Article
      Is Meningitis Contagious? Article
      • What is meningitis?
      • Is meningitis contagious?
      • How contagious is meningitis?
      • How long is meningitis contagious?
      • What is the incubation period for meningitis?
      • How is meningitis transmitted?
      • How long does meningitis last?
      • When should someone seek medical care for meningitis?
    • Is Norovirus Contagious? Noroviruses cause food poisoning symptoms in infected individuals. Norovirus is transmitted via direct and indirect contact....learn more »
      In This Article
      Is Norovirus Contagious? Article
      • What is norovirus?
      • Is norovirus contagious?
      • What is the contagious period for norovirus?
      • How will I know if I have norovirus?
      • How is norovirus transmitted?
      • How will I know I am cured of norovirus?
      • When should I contact a medical caregiver about norovirus?
    • Is Pneumonia Contagious? Pneumonia is inflammation of the lung usually caused by bacterial or viral infection (rarely, also by fungi) that causes the air...learn more »
      In This Article
      Is Pneumonia Contagious? Article
      • What is pneumonia?
      • Is pneumonia contagious?
      • When is pneumonia contagious?
      • What is the incubation period for pneumonia?
      • Can pneumonia spread?
      • How long is pneumonia contagious?
      • When should someone seek medical care for pneumonia?
    • Is Scarlet Fever Contagious? Group A strep bacteria cause scarlet fever. Scarlet fever is transmitted via person-to-person contact and by coming in contact...learn more »
      In This Article
      Is Scarlet Fever Contagious? Article
      • What is scarlet fever?
      • Is scarlet fever contagious?
      • How will I know if I have scarlet fever?
      • How is scarlet fever transmitted?
      • When will I know I am cured of scarlet fever?
      • When should I contact a physician about scarlet fever?
    • Is Swine Flu (H1N1) Contagious? Swine flu (H1N1) is a contagious virus that spreads when an infected individual expels virus-containing droplets into the air...learn more »
      In This Article
      Is Swine Flu (H1N1) Contagious? Article
      • What is swine flu?
      • Is swine flu (H1N1) contagious?
      • What is the contagious period for swine flu (H1N1)?
      • How will I know if I have swine flu?
      • How is swine flu transmitted?
      • How will I know if I am cured of swine flu?
      • When should I contact a medical caregiver about swine flu (H1N1)?
    • Is the Ebola Virus Contagious? Ebola hemorrhagic fever is a highly contagious disease that is transmitted through direct contact. Ebola's incubation period...learn more »
      In This Article
      Is the Ebola Virus Contagious? Article
      • What is Ebola?
      • Is Ebola contagious?
      • What is the incubation period for the Ebola virus?
      • How will I know if someone is infected with Ebola?
      • How is the Ebola virus transmitted?
      • How will I know if someone is cured of Ebola? What is the contagious period for Ebola?
      • When should I contact a medical caregiver about Ebola?
    • Is the Stomach Flu Contagious? The stomach flu (gastroenteritis) refers to variety infections that occur in the GI (gastrointestinal tract). The stomach flu is...learn more »
      In This Article
      Is the Stomach Flu Contagious? Article
      • What is the stomach flu?
      • Is the stomach flu contagious?
      • How will I know if I have the stomach flu (signs and symptoms)?
      • How is stomach flu spread?
      • How long does the stomach flu last?
      • When is stomach flu contagious (how long is it contagious)?
      • How long is stomach flu contagious on surfaces?
      • When should I contact a health-care professional about the stomach flu?
    • Is Whooping Cough (Pertussis) Contagious? Whooping cough (pertussis) is a highly contagious respiratory infection caused by Bordetella pertussis. Pertussis is...learn more »
      In This Article
      Is Whooping Cough (Pertussis) Contagious? Article
      • What is whooping cough (pertussis)?
      • Is whooping cough contagious?
      • How will I know if someone has whooping cough? What are the various stages of pertussis?
      • How is whooping cough transmitted? What is the incubation period for pertussis? What is the contagious period for pertussis?
      • When will I know someone is cured of whooping cough?
      • When should I contact a medical caregiver about whooping cough?
      • Can whooping cough be prevented?
    • Kidney Infection (Pyelonephritis) Kidney infection (pyelonephritis) usually is caused from bacteria that have spread from the bladder from a UTI (urinary tract...learn more »
    • Kidney Pain Kidney pain has a variety of causes and symptoms. Infection, injury, trauma, bleeding disorders, kidney stones, and less common...learn more »
    • Kidney Stones Kidney stones are solid masses of crystalline material that form in the kidneys. Symptoms of kidney stones can include pain,...learn more »
    • Lassa Fever Lassa fever is a viral hemorrhagic fever that causes flu-like symptoms. Ribavirin is the standard treatment for Lassa fever....learn more »
      In This Article
      Lassa Fever Article
      • Lassa fever facts
      • What is Lassa fever?
      • What is the history of Lassa fever?
      • What are causes and risk factors for Lassa fever?
      • Is Lassa fever contagious? If so, what is the contagious period for Lassa fever?
      • When is Lassa fever no longer contagious?
      • What is the incubation period for Lassa fever?
      • What are Lassa fever symptoms and signs?
      • How do physicians diagnose Lassa fever?
      • What is the treatment for Lassa fever?
      • What are complications for Lassa fever?
      • What is the prognosis of Lassa fever?
      • Is it possible to prevent Lassa fever? Is there a vaccine for Lassa fever?
      • What research is being done on Lassa fever?
      • Where can people find more information on Lassa fever?
    • Listeria Listeria is a type of bacteria that can cause food poisoning. Listeriosis symptoms include diarrhea, nausea, and...learn more »
      In This Article
      Listeria Article
      • Listeriosis (Listeria monocytogenes infection) facts
      • What is listeriosis? What causes listeriosis?
      • What are the risk factors for listeriosis?
      • Is Listeria contagious?
      • How is listeriosis spread?
      • What are listeriosis symptoms and signs?
      • What is the incubation period for Listeria?
      • How long does a Listeria infection last?
      • What types of doctors treat listeriosis?
      • How do health care professionals diagnose listeriosis?
      • What is the treatment for listeriosis?
      • Are there home remedies for listeriosis?
      • How does a person get listeriosis?
      • What are the complications of listeriosis?
      • Is it possible to prevent listeriosis?
      • What is the prognosis for Listeria infections?
      • If a person has eaten recalled food potentially contaminated with Listeria, what should he or she do?
      • What is the government doing about listeriosis?
    • Malaria Malaria is a disease that is spread by the bite of an infected Anopheles mosquito. Malaria symptoms include fever, chills,...learn more »
      In This Article
      Malaria Article
      • Malaria facts
      • What is malaria?
      • Is malaria contagious?
      • What is the incubation period for malaria?
      • What causes malaria?
      • What are malaria symptoms and signs?
      • What specialists treat malaria?
      • How do physicians diagnose malaria?
      • What is the treatment for malaria?
      • Can malaria reoccur after treatment?
      • What is the prognosis of malaria?
      • Is there a malaria vaccine?
      • How can people prevent malaria?
    • Marburg Virus Disease Marburg virus disease is a zoonotic infection that produces symptoms such as chills, headaches, fever, and muscle aches. The...learn more »
      In This Article
      Marburg Virus Disease Article
      • Marburg virus disease facts
      • What is Marburg virus disease?
      • What causes Marburg disease?
      • What are the symptoms and signs of Marburg infection? What is the incubation period for a Marburg virus infection?
      • What are risk factors for getting Marburg infections?
      • How do health-care professionals diagnose Marburg viral infections?
      • What treatment is available for Marburg virus infections?
      • What specialists treat Marburg infections?
      • Is it possible to prevent Marburg virus infections?
      • What is the prognosis for a Marburg virus infection? What complications may occur with Marburg infections?
      • What research is ongoing about Marburg virus infections?
      • Why is Africa now seeing so many cases of what were relatively rare viral diseases like Ebola and Marburg virus infections?
    • Meniere Disease Meniere disease (idiopathic endolymphatic hydrops) is an inner ear disorder with symptoms that include: vertigo, tinnitus,...learn more »
      In This Article
      Meniere Disease Article
      • Meniere's disease facts
      • What is Meniere's disease?
      • What causes Meniere's disease?
      • What are the symptoms of Meniere's disease?
      • How is Meniere's disease diagnosed?
      • How can Meniere's disease be treated?
    • Meningitis Encephalitis is a brain inflammation that causes sudden fever, vomiting, headache, light sensitivity, stiff neck and back,...learn more »
      In This Article
      Meningitis Article
      • Encephalitis and meningitis facts
      • What is encephalitis?
      • What causes encephalitis?
      • What are encephalitis symptoms and signs?
      • Is encephalitis contagious?
      • Is it possible to prevent encephalitis? Is there an encephalitis vaccine?
      • What is meningitis?
      • What causes meningitis?
      • What are meningitis symptoms and signs?
      • What is encephalomyelitis?
      • What are the risk factors for encephalitis and meningitis?
      • What specialties of doctors treat encephalitis and meningitis?
      • How do health-care professionals diagnose encephalitis and meningitis?
      • What is the treatment of encephalitis and meningitis?
      • What is the prognosis (outlook), and what are the complications for patients with encephalitis or meningitis?
      • Is meningitis contagious?
      • Is it possible to prevent meningitis? Is there a meningitis vaccine?
    • Migraine Headache Migraine headaches are severe headaches that are sensitive to light, sounds, and smells. Some people who suffer from...learn more »
      In This Article
      Migraine Headache Article
      • Migraine headache definition and facts
      • What is a migraine headache?
      • What is migraine with aura?
      • What are migraine triggers?
      • What are the signs and symptoms?
      • What causes migraines?
      • What are the risk factors?
      • How can I tell if it's a migraine or a different type of headache?
      • What are the treatments for migraine headaches?
      • Migraine medications
      • What remedies and lifestyle changes help manage and decrease the frequency of migraines?
      • How are migraines managed during pregnancy?
      • How are migraines managed in children?
      • What is the prognosis for a person with migraines?
      • Can the frequency of headaches be prevented?
    • Motion Sickness Motion sickness is a feeling of unwellness caused by the inner ear and balance systems. Motion sickness can include sea sickness,...learn more »
      In This Article
      Motion Sickness Article
      • What is motion sickness?
      • Who is at risk for motion sickness?
      • What are causes of motion sickness?
      • What are the signs and symptoms of motion sickness?
      • When should I call a doctor for motion sickness?
      • How is motion sickness diagnosed?
      • What is the treatment for motion sickness?
      • Home remedies for motion sickness
      • OTC and prescription medication for motion sickness
      • Can motion sickness be prevented?
    • Munchausen Syndrome by Proxy (MSBP) Munchausen syndrome by proxy (MSBP) is a mental illness (factitious disorder) in which a caregiver secretly abuses a child by...learn more »
      In This Article
      Munchausen Syndrome by Proxy (MSBP) Article
      • Munchausen syndrome by proxy facts
      • What is Munchausen syndrome by proxy?
      • What causes Munchausen syndrome by proxy? What are MSBP risk factors?
      • What are Munchausen syndrome by proxy symptoms and signs?
      • How do health-care professionals diagnose Munchausen syndrome by proxy? What types of specialists treat MSBP?
      • What is the treatment for Munchausen syndrome by proxy?
      • What are the complications of Munchausen syndrome by proxy? What is the prognosis of MSBP?
      • Is it possible to prevent Munchausen syndrome by proxy?
      • Where can one get more information on Munchausen syndrome by proxy?
    • Naegleria fowleri Naegleria fowleri is an amoeba found in freshwater and soil. Infection results when the amoeba enters the nose and travels to the...learn more »
      In This Article
      Naegleria fowleri Article
      • Naegleria fowleri (brain-eating amoeba) infection facts
      • What is Naegleria fowleri?
      • What causes a Naegleria fowleri infection?
      • What are risk factors for Naegleria fowleri infection?
      • Is Naegleria fowleri infection contagious?
      • What are signs and symptoms of a Naegleria fowleri infection?
      • What types of specialists treat Naegleria fowleri infections?
      • How do health-care professionals diagnose a Naegleria fowleri infection?
      • What is the treatment for a Naegleria fowleri infection?
      • Is it possible to prevent Naegleria fowleri infections?
      • What is the prognosis of a Naegleria fowleri infection?
      • Where can people find additional information about Naegleria fowleri infections?
    • Norovirus Infection Norovirus infection causes stomach flu, or gastroenteritis. It's a very contagious illness with symptoms that include nausea and...learn more »
    • Pancreatitis Pancreatitis is a rare disease in which the pancreas becomes inflamed. There are two types of pancreatitis: acute and chronic....learn more »
    • Peanut Allergy About 1% to 2% of people in the U.S. have a peanut allergy. Symptoms and signs of a peanut allergy include rash, hives, redness,...learn more »
      In This Article
      Peanut Allergy Article
      • Peanut allergy facts
      • What is a peanut allergy?
      • How common is a peanut allergy?
      • Why is peanut allergy increasing and what are risk factors for a peanut allergy?
      • What are peanut allergy symptoms and signs? How do physicians diagnose a peanut allergy?
      • How are peanut allergies managed? What is the treatment for a peanut allergy?
      • Can a peanut allergy be cured or outgrown?
    • Peritonitis Peritonitis is a bacterial infection inside of the abdomen. Some doctors choose to group the causes of peritonitis into five...learn more »
      In This Article
      Peritonitis Article
      • Peritonitis facts
      • What is peritonitis?
      • What are the signs and symptoms of peritonitis?
      • What are the causes of peritonitis?
      • What is the most common type of peritonitis?
      • What kind of doctor treats peritonitis?
      • How is peritonitis diagnosed?
      • What is the treatment for peritonitis?
      • What are the complications of peritonitis?
      • Can peritonitis be prevented?
      • What is the prognosis for a person with peritonitis?
    • Porphyria Porphyria is a group of disorders that affect the nervous system, skin, or both. Porphyria is often an inherited condition that...learn more »
      In This Article
      Porphyria Article
      • Porphyria facts*
      • What is porphyria?
      • What are the types of porphyria?
      • What causes porphyria?
      • What are the symptoms of porphyria?
      • How is porphyria diagnosed?
      • How is porphyria treated?
    • Powassan Virus Disease Powassan (POW) virus disease is a rare tick-borne disease that causes symptoms such as confusion, memory problems, fever,...learn more »
      In This Article
      Powassan Virus Disease Article
      • Powassan virus (POW virus) facts
      • What are the types of Powassan virus (POW virus)?
      • What is Powassan virus disease?
      • What causes Powassan virus disease?
      • What are risk factors for Powassan virus disease?
      • Where have most incidences of Powassan virus disease occurred?
      • What are signs and symptoms of Powassan virus disease?
      • What tests do health care professionals use to diagnose Powassan virus disease?
      • What is the treatment for Powassan virus disease?
      • Are there home remedies for Powassan virus disease?
      • What are complications of Powassan virus disease?
      • What is the prognosis for Powassan virus disease?
      • Is it possible to prevent Powassan virus disease?
    • Q Fever Q fever is a highly infectious disease that causes high fever, diarrhea, cough, and sweating. Infected animals may transmit Q...learn more »
      In This Article
      Q Fever Article
      • Q fever facts
      • What is Q fever?
      • Where does the name Q fever come from? What causes Q fever?
      • How does Q fever spread?
      • What is the incubation period for Q fever?
      • Who is at risk for getting Q fever?
      • Are there different forms of Q fever?
      • Does pasteurization prevent the transmission of Q fever?
      • What are the signs and symptoms of Q fever?
      • What types of specialist treat Q fever?
      • How do physicians diagnose Q fever?
      • Is Q fever contagious?
      • What is the contagious period for Q fever?
      • What is the danger of getting Q fever while pregnant?
      • Is Q fever deadly?
      • What complications may arise with Q fever?
      • If it is not Q fever, what else could it be?
      • What should people do if they have been exposed to Q fever?
      • Is there any treatment for Q fever?
      • What is the prognosis for Q fever?
      • Is there a vaccine against Q fever?
      • Is Q fever a bioterrorism threat?
      • Where can people find more information about Q fever?
    • Reye's Syndrome Reye's syndrome (RS or Reye syndrome) is a sudden, sometimes fatal, disease of the brain with degeneration of the liver. Reye...learn more »
      In This Article
      Reye's Syndrome Article
      • Reye's syndrome facts
      • What is Reye's syndrome?
      • What causes Reye's syndrome?
      • What are risk factors for Reye's syndrome?
      • What are Reye's syndrome symptoms and signs?
      • How do health-care professionals diagnose Reye's syndrome?
      • What is the treatment for Reye's syndrome?
      • What is the prognosis for Reye's syndrome?
      • Is it possible to prevent Reye's syndrome?
      • What research is being done on Reye's syndrome?
      • Where can I find more information about Reye's syndrome?
    • Rocky Mountain Spotted Fever (RMSF) Rocky Mountain spotted fever is a tick-borne disease that causes symptoms and signs such as fever, rash, headache, and muscle...learn more »
      In This Article
      Rocky Mountain Spotted Fever (RMSF) Article
      • Rocky Mountain spotted fever facts
      • What is Rocky Mountain spotted fever?
      • Where do most cases of RMSF occur in the U.S.?
      • What causes Rocky Mountain spotted fever?
      • How is Rocky Mountain spotted fever transmitted?
      • What are Rocky Mountain spotted fever risk factors?
      • Is Rocky Mountain spotted fever contagious?
      • What are Rocky Mountain spotted fever symptoms and signs?
      • What is the incubation period for Rocky Mountain spotted fever?
      • What specialists treat Rocky Mountain spotted fever?
      • How do health-care providers diagnose Rocky Mountain spotted fever?
      • What is the treatment for Rocky Mountain spotted fever?
      • What is the prognosis of Rocky Mountain spotted fever?
      • What are the long-term effects of Rocky Mountain spotted fever?
      • Is there a vaccine for Rocky Mountain spotted fever?
      • Is it possible to prevent Rocky Mountain spotted fever?
    • Rotavirus Rotavirus is the most common cause of severe diarrhea among infants and children throughout the world. Almost all children have...learn more »
      In This Article
      Rotavirus Article
      • Rotavirus infection facts
      • What is rotavirus?
      • What causes rotavirus infections?
      • Rotavirus vs. norovirus
      • What are risk factors for rotavirus infection?
      • Can adults get a rotavirus infection?
      • What is the incubation period for rotavirus?
      • What are rotavirus infection symptoms and signs?
      • Is rotavirus contagious? How long is rotavirus contagious?
      • How is rotavirus transmitted?
      • What specialists treat rotavirus infection?
      • How do health-care professionals diagnose a rotavirus infection?
      • What is the treatment for a rotavirus infection?
      • What is the prognosis of a rotavirus infection?
      • Can a vaccine prevent rotavirus infections? Are any side effects associated with the rotavirus vaccine?
    • Salmonella Salmonella infection (salmonellosis) is typically caused by the consumption of contaminated foods. Symptoms of salmonellosis...learn more »
      In This Article
      Salmonella Article
      • Salmonella food poisoning facts
      • What is Salmonella food poisoning?
      • What causes Salmonella outbreaks? How does Salmonella spread?
      • What are risk factors for Salmonella food poisoning?
      • What are symptoms and signs of Salmonella poisoning?
      • Is Salmonella contagious?
      • What is the incubation period for a Salmonella infection?
      • What is the contagious period for salmonellosis?
      • What kinds of doctors treat Salmonella food poisoning?
      • How do physicians diagnose Salmonella food poisoning?
      • What is the treatment for Salmonella food poisoning?
      • What are complications of Salmonella food poisoning?
      • What is the prognosis of Salmonella food poisoning?
      • Is it possible to prevent Salmonella food poisoning?
    • Scarlet Fever (Scarlatina) Scarlet fever, a bacterial infection caused by group A Streptococcus bacteria, causes symptoms and signs such as fever, rash with...learn more »
      In This Article
      Scarlet Fever (Scarlatina) Article
      • Scarlet fever facts
      • What is scarlet fever?
      • What causes scarlet fever?
      • What is the incubation period for scarlet fever?
      • What are risk factors for scarlet fever?
      • What is the contagious period for scarlet fever?
      • What are scarlet fever symptoms and signs?
      • How do physicians diagnose scarlet fever?
      • What is the treatment for scarlet fever?
      • What are complications of scarlet fever?
      • What is the prognosis of scarlet fever? What are the long-term effects of scarlet fever?
      • Is it possible to prevent scarlet fever? Is there a scarlet fever vaccine?
    • Sepsis Sepsis (blood poisoning) is a potentially deadly infection with signs and symptoms that include elevated heart rate, low or high...learn more »
      In This Article
      Sepsis Article
      • Sepsis (blood poisoning) facts
      • What is blood poisoning?
      • What is sepsis?
      • What are the stages of sepsis?
      • Why are there so many diseases with "sepsis," "septic," "septicemia," or "blood poisoning" in their name?
      • What causes sepsis?
      • Is sepsis contagious? How long is the incubation and/or contagious period for sepsis?
      • What are the risk factors for sepsis?
      • What are sepsis (blood poisoning) symptoms and signs?
      • How do health care professionals diagnose sepsis?
      • What is the treatment for sepsis?
      • What types of health care professionals specialize in the treatment of sepsis?
      • What is the prognosis with sepsis?
      • What are the complications of sepsis?
      • Is it possible to prevent sepsis (blood poisoning)?
      • What are some additional sources for information on sepsis (blood poisoning)?
    • Shigella Shigellosis is a disease caused by the Shigella bacteria. Bloody diarrhea, stomach cramps, and fever are common symptoms. Mild...learn more »
      In This Article
      Shigella Article
      • Shigellosis facts*
      • What is shigellosis?
      • What are the symptoms of Shigella?
      • How long after infection do symptoms appear?
      • How long will symptoms last?
      • Can there be any complications from Shigella infections?
      • How can Shigella infections be diagnosed?
      • How can Shigella infections be treated?
      • Is antibiotic resistance a problem with Shigella?
      • How will I know if I have an antibiotic-resistant Shigella infection?
      • What should I do if I have an antibiotic-resistant Shigella infection?
      • How can we reduce the spread of antibiotic-resistant Shigella?
      • How is Shigella spread?
      • How can I reduce my risk of getting shigellosis?
      • I was diagnosed with shigellosis. What can I do to avoid giving it to other people?
      • My child was diagnosed with shigellosis. How can I keep others from catching it?
      • Should an infected person be excluded from school or work?
      • What else can be done to prevent shigellosis?
      • What can be done if an outbreak of Shigella occurs in the childcare setting?
      • People at Risk
      • Incidence
    • Stomach Flu (Gastroenteritis ) Stomach flu (gastroenteritis) is a term referred used to describe a variety of gastrointestinal problems. The most common signs...learn more »
      In This Article
      Stomach Flu (Gastroenteritis ) Article
      • Stomach flu (gastroenteritis) definition and facts
      • What is the stomach flu (gastroenteritis)?
      • Are the stomach flu (gastroenteritis) and food poisoning the same condition?
      • Are the stomach flu (gastroenteritis) and the flu (influenza) the same infection?
      • What are the signs and symptoms of stomach flu (gastroenteritis)?
      • What are the signs and symptoms of stomach flu (gastroenteritis) in children?
      • How is the stomach flu (gastroenteritis) spread?
      • Who gets the stomach flu (gastroenteritis)?
      • How long does the stomach flu (gastroenteritis) last?
      • Is stomach flu (gastroenteritis) contagious?
      • What causes stomach flu (gastroenteritis)?
      • What are the most common causes of the stomach flu (gastroenteritis)?
      • How do I know I have the stomach flu (gastroenteritis)?
      • What natural and home remedies help soothe stomach flu (gastroenteritis) symptoms?
      • What should foods are recommended to eat (diet ) when you have the stomach flu (gastroenteritis)?
      • What is the treatment for the stomach flu (gastroenteritis)?
      • Which specialties of doctors treat the stomach flu (gastroenteritis)?
      • When should I call my doctor for stomach flu (gastroenteritis)?
      • What are complications of stomach flu (gastroenteritis)?
      • Can you prevent from getting the stomach flu (gastroenteritis)?
      • What is the prognosis for a person who gets the stomach flu (gastroenteritis)?
    • Strep Throat Strep throat is a bacterial infection of the throat. Signs and symptoms of strep throat include headache, nausea,...learn more »
    • Streptococcal Infections Group A streptococcal infections are caused by group A streptococcus, a bacteria that causes a variety of health problems,...learn more »
      In This Article
      Streptococcal Infections Article
      • Group A streptococcal infections facts
      • What is group A Streptococcus (GAS)?
      • How are group A streptococcal (GAS) infections contracted?
      • What diseases are caused by group A streptococcal infection?
      • Are group A strep infections contagious?
      • What is the contagious period for group A strep infections?
      • What is the incubation period for group A strep infections?
      • What are the symptoms and signs of GAS infections?
      • What is invasive group A streptococcal disease? Who is most at risk for getting invasive GAS disease?
      • What are the symptoms and signs of necrotizing fasciitis?
      • What are the signs and symptoms of toxic shock syndrome (TSS)?
      • How are group A streptococcal (GAS) infections diagnosed?
      • What is the treatment for invasive group A streptococcal disease?
      • What specialists treat group A streptococcal infections?
      • What complications are seen with group A streptococcal infections?
      • Is it possible to prevent group A streptococcal infections?
      • What is the prognosis for group A streptococcal infections?
      • Where can people find more information about group A streptococcal infections?
    • Swine Flu Novel H1N1 influenza A virus infection (swine flu) is an infection that generally is transferred from an infected pig to a human,...learn more »
      In This Article
      Swine Flu Article
      • Swine flu (H1N1 and H3N2 influenza virus) facts
      • What is the swine flu?
      • How is swine flu transmitted? Is swine flu contagious?
      • What is the incubation period for swine flu?
      • What is the contagious period for swine flu?
      • How long does the swine flu last?
      • What causes swine flu?
      • Why is swine flu now infecting humans?
      • What are swine flu symptoms and signs?
      • What tests do health care professionals use to diagnose swine flu?
      • What types of health care professionals treat swine flu?
      • What is the treatment for swine flu?
      • What is the history of swine flu in humans?
      • What are the risk factors for swine flu?
      • Is it possible to prevent swine flu with a vaccine?
      • Is it possible to prevent swine flu if the swine flu vaccine (or other flu strain vaccines) is not readily available?
      • Are there home remedies for swine flu?
      • Was swine flu (H1N1) a cause of an epidemic or pandemic in the 2009-2010 flu season?
      • What is the prognosis (outlook) and complications for patients who get swine flu?
      • Where can I find more information about swine flu (H1N1 and H3N2v)?
    • Teen Drug Abuse Drugs commonly abused by teens include tobacco products, marijuana, cold medications, inhalants, depressants, stimulants,...learn more »
      In This Article
      Teen Drug Abuse Article
      • Teen drug abuse facts
      • What drugs are abused by teenagers?
      • What are some adolescent drug use statistics?
      • What are the dangerous effects of drug use in teens?
      • How can parents prevent drug use?
      • What are the symptoms and warning signs of drug abuse?
      • What is drug abuse?
      • What are the causes and risk factors of teen drug use?
      • What are the symptoms of drug abuse in teens?
      • What is the treatment of drug intoxication?
      • What are treatments for drug addiction?
      • Where can a person get help for teen drug abuse?
    • Tension Headache A tension headache s one of the most common types of headaches, and the exact cause is not known. Factors that may contribute to...learn more »
      In This Article
      Tension Headache Article
      • Tension headache facts
      • What is a tension headache?
      • What causes tension headaches?
      • What are the symptoms of tension headache?
      • How are tension headaches diagnosed?
      • What is the treatment for tension headache?
      • Prescription medications for tension headaches
      • OTC drugs for tension headaches
      • Managing stress
      • Are there effective home remedies a cure for tension headache?
      • Can tension headaches be prevented?
    • Toxic Shock Syndrome (TSS) Toxic shock syndrome is an infection that causes symptoms such as low blood pressure, fever, and a rash with peeling skin....learn more »
      In This Article
      Toxic Shock Syndrome (TSS) Article
      • Toxic shock syndrome (TSS) facts
      • What is toxic shock syndrome?
      • What causes toxic shock syndrome?
      • What are risk factors for toxic shock syndrome?
      • What are toxic shock syndrome symptoms and signs?
      • How do physicians diagnose toxic shock syndrome?
      • What is the treatment for toxic shock syndrome?
      • What is the prognosis of toxic shock syndrome?
      • Is it possible to prevent toxic shock syndrome?
    • Typhus Typhus is a disease caused by Rickettsia bacteria. Symptoms and signs include fever, headache, nausea, vomiting, diarrhea, and...learn more »
      In This Article
      Typhus Article
      • Typhus facts
      • What is typhus? Are there different types of typhus?
      • What is the history of typhus?
      • What causes typhus? How is typhus transmitted?
      • What are typhus risk factors?
      • What are typhus symptoms and signs?
      • How is typhus diagnosed?
      • What is the treatment for typhus?
      • What is the prognosis of typhus?
      • Can typhus be prevented?
      • Where can people get more information about typhus?
    • Vertigo Vertigo is the sensation of spinning or rocking, even when someone is at rest. Vertigo may be caused by a problem in the brain or...learn more »
    • Yellow Fever Yellow fever is an infectious disease transmitted by infected mosquitoes. Side effects are rare with the yellow fever vaccine....learn more »
      In This Article
      Yellow Fever Article
      • Yellow fever facts
      • What is yellow fever? What is the history of yellow fever?
      • What causes yellow fever?
      • How is yellow fever transmitted?
      • What areas are high risk for contracting yellow fever?
      • What is the incubation period for yellow fever?
      • Is yellow fever contagious? How long is the contagious period for yellow fever?
      • What types of specialists treat yellow fever?
      • What are yellow fever symptoms and signs?
      • How do health-care professionals diagnose yellow fever?
      • What is the treatment for yellow fever?
      • How long does yellow fever last?
      • What is the prognosis for people with yellow fever?
      • Is it possible to prevent yellow fever?
      • What are the side effects of the yellow fever vaccine?
      • Where can people get more information on yellow fever?
    • Zika Virus (Zika Fever) The Zika virus is transmitted by the bite of an infected Aedes mosquito. Symptoms and signs of a Zika virus infection include...learn more »
      In This Article
      Zika Virus (Zika Fever) Article
      • Zika virus facts
      • What is Zika virus?
      • What is the history of Zika virus outbreaks?
      • What are causes and risk factors of a Zika virus infection?
      • How is the Zika virus transmitted?
      • What is the incubation period for a Zika virus infection?
      • Is the Zika virus contagious?
      • What is the contagious period for a Zika virus infection?
      • What are symptoms and signs of a Zika virus infection?
      • What exams and tests do health-care professionals use to diagnose a Zika virus infection?
      • Can people who have returned from a country with active Zika outbreaks get tested for the infection?
      • Are there home remedies for a Zika virus infection?
      • What is the treatment for a Zika virus infection?
      • What specialists treat Zika infections?
      • What are the complications of Zika virus infections?
      • What are the risks of contracting a Zika virus infection during pregnancy?
      • What is the prognosis of a Zika virus infection?
      • Is it possible to prevent a Zika virus infection?
      • Is there a vaccine against Zika virus?
      • CDC advisory on travel to areas with Zika virus, including the U.S. (Florida)
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Symptoms & Signs A-Z List