Fever

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Fever is considered a temperature above 100.4 degrees F (38 degrees C). A feverish sensation, however, may occur when the body temperature is above the average normal of 98.6 degrees F. (37 degrees C).

Fever is part of the body's own disease-fighting arsenal. Rising body temperatures apparently are capable of killing off many disease-producing organisms. For that reason, low fevers should normally go untreated. Although, if the fever is accompanied by any other troubling symptoms, you may need to see your doctor to be certain. As fevers range to 104 F and above, however, there can be unwanted consequences, particularly for children. These can include delirium and convulsions. A fever of this sort demands immediate home treatment and then medical attention. Home treatment possibilities include the use of aspirin or, in children, nonaspirin painkillers such as acetaminophen (Tylenol), cool baths, or sponging to reduce the fever while seeking medical help. Fever may occur with almost any type of infection of illness. The temperature is measured with a thermometer.

Fever is also called pyrexia.

Medically Reviewed by a Doctor on 2/28/2012

Health concern on your mind? Visit the Symptom Checker.

REFERENCE:

Fauci, Anthony S., et al. Harrison's Principles of Internal Medicine. 17th ed. United States: McGraw-Hill Professional, 2008.

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      • What is the usual course and treatment of mono?
      • What are the complications of mono?
      • How can mono be prevented?
      • Conclusion
    • Inflammatory Bowel Disease (Intestinal Problems of IBD) The inflammatory bowel diseases (IBD) are Crohn's disease (CD) and ulcerative colitis (UC). The intestinal complications of...learn more »
      In This Article
      Inflammatory Bowel Disease (Intestinal Problems of IBD) Article
      • Intestinal bowel disease facts
      • What is inflammatory bowel disease (IBD)?
      • What are the intestinal complications of IBD?
      • Are the intestinal complications of ulcerative colitis and Crohn's disease different?
      • Do intestinal ulcers occur in IBD?
      • How are ulcers in IBD diagnosed and treated?
      • Does gastrointestinal bleeding occur in IBD?
      • How is gastrointestinal bleeding in IBD diagnosed and treated?
      • How do intestinal strictures form in IBD?
      • What are symptoms of intestinal strictures, and how are they diagnosed and treated?
      • What are intestinal fistulas?
      • What symptoms do fistulas cause and how are they diagnosed and treated?
      • What are fissures and how are they treated?
      • What is small intestinal bacterial overgrowth (SIBO)?
      • Does colon cancer occur in IBD?
      • What should be done about polyps in IBD?
      • What is toxic megacolon and what are its causes and symptoms?
      • What kind of malabsorption occurs in IBD?
    • Kawasaki Disease Kawasaki disease is a rare children's disease characterized by a fever that lasts more than five days and at least four of the...learn more »
      In This Article
      Kawasaki Disease Article
      • Kawasaki's disease facts
      • What is Kawasaki's disease, and how is it diagnosed?
      • What is mucocutaneous lymph node syndrome?
      • What are the usual symptoms and signs of Kawasaki's disease?
      • What are the less common findings?
      • What is the difference between Kawasaki's disease and Kawasaki's syndrome?
      • What causes Kawasaki's disease?
      • Who develops Kawasaki's disease?
      • How can Kawasaki's disease cause serious complications?
      • What is the treatment for Kawasaki's disease?
      • What is the prognosis for children with Kawasaki's disease?
      • Can Kawasaki's disease be prevented?
    • Kidney Cancer There are several types of kidney cancer, including renal cell cancer (renal adenocarcinoma or hypernephroma), transitional cell...learn more »
      In This Article
      Kidney Cancer Article
      • Kidney cancer facts*
      • What are the kidneys?
      • What is cancer?
      • What are kidney cancer causes and risk factors?
      • What are kidney cancer symptoms and signs?
      • How is kidney cancer diagnosed?
      • How is kidney cancer staging determined?
      • Methods of kidney cancer treatment
      • What are the side effects of treatment for kidney cancer?
      • What happens after treatment for kidney cancer?
      • What does the future hold in the field of kidney cancer?
      • What resources are there for patients with kidney cancer?
    • Kidney Infection (Pyelonephritis) Kidney infection (pyelonephritis) usually is caused from bacteria that have spread from the bladder from a UTI (urinary tract...learn more »
      In This Article
      Kidney Infection (Pyelonephritis) Article
      • Kidney infection facts
      • What is the function of the kidneys?
      • Where are the kidneys located?
      • What is a kidney infection?
      • What are the causes of kidney infection?
      • What are risk factors for kidney and urinary tract infection?
      • Is screening recommended for UTI or kidney infection?
      • What are the signs and symptoms of kidney infection?
      • How is kidney infection diagnosed?
      • What are different types of kidney infection?
      • What are the common bacteria that cause kidney infections?
      • What is the treatment for kidney infection?
      • Are there foods I should avoid if I have a kidney infection?
      • Can kidney infection be prevented?
    • Kidney Stones Kidney stones are solid masses of crystalline material that form in the kidneys. Symptoms of kidney stones can include pain,...learn more »
      In This Article
      Kidney Stones Article
      • What is a kidney stone?
      • What causes kidney stones?
      • What are the different types of kidney stones?
      • Who is at risk for kidney stones?
      • What are the signs and symptoms of kidney stones?
      • How are kidney stones diagnosed?
      • What is the treatment for kidney stones?
      • What is the prognosis for kidney stones?
      • Can kidney stones be prevented?
    • Legionnaires' Disease Legionellosis is an infection caused by the Legionella pneumophila bacterium. There are two forms of legionellosis: Pontiac fever...learn more »
      In This Article
      Legionnaires' Disease Article
      • Legionnaires' disease and Pontiac fever (legionellosis) facts
      • What causes legionellosis? What is the history of Legionnaires' disease?
      • How common is Legionnaires' disease?
      • What are the usual symptoms of Legionnaires' disease?
      • How is the diagnosis of Legionnaires' disease made?
      • Who develops Legionnaires' disease?
      • What is the treatment for Legionnaires' disease?
      • How is Legionnaires' disease spread?
      • Where is the Legionella bacterium found?
      • How can Legionnaires' disease be prevented?
    • Leishmaniasis Leishmaniasis is a disease caused by the bite of an infected sand fly. The most common types of leishmania infection are...learn more »
      In This Article
      Leishmaniasis Article
      • Leishmaniasis facts
      • What is leishmaniasis?
      • What are the different types of leishmaniasis?
      • What causes leishmaniasis? How is leishmaniasis transmitted?
      • What are risk factors for leishmaniasis?
      • What are leishmaniasis symptoms and signs?
      • How is leishmaniasis diagnosed?
      • What is the treatment for leishmaniasis?
      • What is the prognosis of leishmaniasis?
      • Can leishmaniasis be prevented?
      • Where can people get more information about leishmaniasis?
    • Leptospirosis Leptospirosis is an infectious disease that causes symptoms such as fever, headache, and chills. Treatment for leptospirosis...learn more »
      In This Article
      Leptospirosis Article
      • Leptospirosis facts
      • What is leptospirosis?
      • What causes leptospirosis?
      • What are risk factors for leptospirosis?
      • What are leptospirosis symptoms and signs?
      • How do physicians diagnose leptospirosis?
      • What is the treatment for leptospirosis?
      • What is the prognosis of leptospirosis?
      • Is it possible to prevent leptospirosis?
    • Listeria Listeria is a type of bacteria that can cause food poisoning. Listeriosis symptoms include diarrhea, nausea and fever. Pregnant...learn more »
      In This Article
      Listeria Article
      • Listeriosis (Listeria monocytogenes infection) facts
      • What is listeriosis? What causes listeriosis?
      • What are listeriosis symptoms and signs?
      • What are the risk factors for listeriosis?
      • How is listeriosis diagnosed?
      • What is the treatment for listeriosis?
      • How does a person get listeriosis?
      • Can listeriosis be prevented?
      • What is the prognosis (outcome) 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?
    • Low Blood Pressure (Hypotension) Low blood pressure, also referred to as hypotension, is blood pressure that is so low that it causes symptoms or signs due to the...learn more »
    • Lyme Disease Lyme disease is a bacterial illness, which is spread by ticks when they bite the skin. Initially the disease affects the skin...learn more »
      In This Article
      Lyme Disease Article
      • Lyme disease facts
      • What is Lyme disease? What causes Lyme disease?
      • What is the history of Lyme disease?
      • What are risk factors for developing Lyme disease?
      • What are symptoms and signs of Lyme disease?
      • How do health-care professionals diagnose Lyme disease?
      • What is the treatment for Lyme disease, and what is its prognosis?
      • Is it possible to prevent Lyme disease? Is there a vaccine?
    • 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?
      • What causes malaria?
      • What are risk factors for malaria? Is it possible to prevent malaria?
      • What are malaria symptoms and signs?
      • How do physicians diagnose malaria?
      • What is the treatment for malaria?
      • What is the prognosis of malaria?
      • Is there a malaria vaccine?
      • Can malaria reoccur after treatment?
    • Measles Measles (rubeola) is a highly contagious disease that's caused by a virus. Symptoms include a rash, high fever, cough, runny...learn more »
      In This Article
      Measles Article
      • Measles facts
      • What is measles?
      • What is rubeola?
      • What is rubella?
      • What are other names for measles?
      • What is the history of measles?
      • What causes measles?
      • How is measles spread?
      • How does one become immune to measles?
      • Who is at risk for getting measles?
      • Is measles deadly?
      • What is the danger of getting measles while pregnant?
      • If I am exposed, how long does it take to develop symptoms and signs?
      • What are measles symptoms and signs?
      • What are the complications seen with measles?
      • What is atypical measles?
      • What is modified measles?
      • How is the diagnosis of measles made?
      • If it is not measles, what else could it be?
      • What should I do if I have been exposed to measles?
      • Is there any treatment for measles after symptoms and signs develop?
      • If measles only rarely occurs in the United States, why should I get vaccinated?
      • Do I need to be revaccinated against measles if I am traveling to Europe?
      • What is the prognosis for measles?
      • How can I prevent contracting measles?
      • Is there any truth to the fear of getting autism from vaccines?
      • Who should not receive measles vaccinations?
      • If a child has an egg allergy, can they still receive the measles vaccine?
      • What adverse reactions can occur to the measles vaccination?
      • Who should be revaccinated against measles?
      • Where can I find more information about measles?
    • Melioidosis Melioidosis (Whitmore's disease) is an infectious disease caused by Burkholderia pseudomallei bacteria. Symptoms include...learn more »
      In This Article
      Melioidosis Article
      • Melioidosis facts
      • What is melioidosis? What causes melioidosis?
      • Where does melioidosis occur?
      • What are symptoms of melioidosis?
      • How is melioidosis diagnosed?
      • How is melioidosis treated?
      • Can melioidosis be prevented?
      • What is the prognosis for melioidosis?
    • 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?
      • What is meningitis?
      • What causes meningitis?
      • What are meningitis symptoms and signs?
      • What is encephalomyelitis?
      • How are encephalitis and meningitis diagnosed?
      • What is the treatment of encephalitis and meningitis?
      • What is the prognosis (outlook) for patients with encephalitis or meningitis?
      • Is meningitis contagious?
      • Can meningitis be prevented?
    • Meningococcemia Meningococcemia is a bloodstream infection caused by Neisseria meningitides. Meningococcemia symptoms include fever, headache,...learn more »
      In This Article
      Meningococcemia Article
      • Meningococcemia facts
      • What is meningococcemia?
      • What causes meningococcemia?
      • What are risk factors for meningococcemia?
      • What are symptoms and signs of meningococcemia?
      • How is meningococcemia diagnosed?
      • What is the treatment for meningococcemia?
      • What is the prognosis of meningococcemia?
      • Is it possible to prevent meningococcemia?
      • Where can people find more information on meningococcemia?
      • What research is being done on meningococcemia?
    • Mold Mold exposure may cause symptoms in people who are sensitive to molds. Symptoms of mold allergy include sneezing, runny nose,...learn more »
      In This Article
      Mold Article
      • Mold facts
      • What is mold?
      • Where can mold be found in homes?
      • What kinds of health problems may be linked to mold? What are symptoms and signs of mold allergy?
      • How can mold in the household be prevented?
      • Is it necessary to test for mold?
      • How should mold be cleaned up and eliminated?
    • Monkeypox Monkeypox is a viral disease that causes symptoms such as fever, sweating, and a rash with papules and pustules on the face and...learn more »
      In This Article
      Monkeypox Article
      • Monkeypox facts
      • What is monkeypox?
      • What is the history of monkeypox?
      • What causes monkeypox? How is monkeypox transmitted?
      • What are risk factors for monkeypox?
      • What are monkeypox symptoms and signs?
      • How is monkeypox diagnosed?
      • What is the treatment for monkeypox?
      • What is the prognosis of monkeypox?
      • Can monkeypox be prevented?
      • What research is being done on monkeypox?
      • Where can people get more information about monkeypox?
    • Mucormycosis Mucormycosis (zygomycosis) is a fungal infection caused by Zygomycetes. Symptoms and signs include fever, headache, coughing,...learn more »
      In This Article
      Mucormycosis Article
      • Mucormycosis (zygomycosis) facts
      • What is mucormycosis?
      • What causes mucormycosis?
      • What are risk factors for mucormycosis?
      • What are symptoms and signs of mucormycosis?
      • How is mucormycosis diagnosed?
      • What is the treatment of mucormycosis?
      • What are complications of mucormycosis?
      • What is the prognosis of mucormycosis?
      • Can mucormycosis be prevented?
      • What research is being done on mucormycosis?
      • Where can people find more information on mucormycosis?
    • Multiple Myeloma Multiple myeloma is a form of cancer that develops in plasma cells, the white blood cells that make antibodies. Symptoms include...learn more »
      In This Article
      Multiple Myeloma Article
      • What is multiple myeloma?
      • What causes multiple myeloma?
      • What are risk factors for multiple myeloma?
      • What are the signs and symptoms of multiple myeloma?
      • How is multiple myeloma diagnosed?
      • What are the stages of multiple myeloma?
      • What is the treatment for multiple myeloma?
      • What is the prognosis for multiple myeloma?
      • What support systems are available for multiple myeloma?
    • Mumps Mumps is an acute viral illness caused by the mumps virus. Symptoms of mumps include fever, headache, muscle aches, tiredness,...learn more »
      In This Article
      Mumps Article
      • Mumps facts
      • What is mumps?
      • What is the history of mumps?
      • What causes mumps? How is mumps transmitted?
      • What are risk factors for contracting mumps?
      • What are the signs and symptoms of mumps in children and adults?
      • How is mumps diagnosed?
      • What is the treatment for mumps in adults and in children?
      • What are complications of mumps?
      • Can mumps be prevented? Is there a vaccine for mumps?
      • What is the prognosis of a mumps infection?
      • Where can people find more information on mumps?
    • Myasthenia Gravis Myasthenia gravis, a chronic autoimmune neuromuscular disease. Varying degrees of weakness of the voluntary muscles of the body...learn more »
      In This Article
      Myasthenia Gravis Article
      • Myasthenia gravis facts*
      • What is myasthenia gravis?
      • What causes myasthenia gravis?
      • What is the role of the thymus gland in myasthenia gravis?
      • What are the symptoms of myasthenia gravis?
      • Who gets myasthenia gravis?
      • How is myasthenia gravis diagnosed?
      • How is myasthenia gravis treated?
      • What are myasthenic crises?
      • What is the prognosis?
      • What research is being done?
      • Where can I get more information?
    • NDM-1 NDM-1 (New Delhi metallo-beta-lactamase) is an enzyme produced by certain strains of bacteria that have recently acquired the...learn more »
      In This Article
      NDM-1 Article
      • NDM-1 facts
      • What is NDM-1?
      • What causes NDM-1 to be produced in bacteria?
      • What are symptoms and signs of a person infected with bacteria carrying NDM-1?
      • How are bacteria that produce NDM-1 identified?
      • What is the treatment for an infection caused by bacteria that make NDM-1?
      • What is the prognosis for a person infected with NDM-1producing bacteria?
      • Can infections with bacteria containing NDM-1 be prevented?
      • Where can people find more information about NDM-1 producing bacteria?
    • Non-Hodgkin's Lymphoma Non-Hodgkin's lymphoma is cancer of the lymphatic system, a vital part of the body's immune system. Symptoms include swollen...learn more »
      In This Article
      Non-Hodgkin's Lymphoma Article
      • Non-Hodgkin's lymphoma facts
      • What is non-Hodgkin's lymphoma?
      • What causes non-Hodgkin's lymphoma?
      • What are risk factors for non-Hodgkin's lymphoma?
      • What are symptoms and signs of non-Hodgkin's lymphoma?
      • How is non-Hodgkin's lymphoma diagnosed?
      • What are the types of non-Hodgkin's lymphoma, and how is non-Hodgkin's lymphoma staging determined?
      • What is the treatment for non-Hodgkin's lymphoma?
      • What is the prognosis and survival rates of non-Hodgkin's lymphoma?
      • Where can people find more information about non-Hodgkin's lymphoma?
    • Norovirus Infection Norovirus infection causes stomach flu, or gastroenteritis. It's a very contagious illness with symptoms that include nausea and...learn more »
      In This Article
      Norovirus Infection Article
      • Norovirus infection facts
      • What is a norovirus?
      • What causes a norovirus infection?
      • What are norovirus infection symptoms and signs in adults, children, and babies?
      • What is the incubation period for a norovirus infection? How long are people infected with norovirus contagious?
      • How is a norovirus infection diagnosed?
      • What is the treatment for norovirus infections in adults, children, and babies?
      • What are possible complications of a norovirus infection?
      • What is the prognosis of a norovirus infection?
      • Can norovirus infections be prevented? Is there a vaccine?
      • Where can people get more information about norovirus infections?
    • Pilonidal Cyst A pilonidal cyst is a cyst that forms near the cleft of the buttocks. The cysts are thought to be caused by the penetration of...learn more »
      In This Article
      Pilonidal Cyst Article
      • Pilonidal cysts facts
      • What is a pilonidal cyst?
      • What causes a pilonidal cyst?
      • Who is at risk for developing a pilonidal cyst?
      • What are the signs and symptoms of a pilonidal cyst?
      • How is a pilonidal cyst diagnosed?
      • What is the treatment for a pilonidal cyst?
      • What are the complications of a pilonidal cyst?
      • How are pilonidal cysts prevented?
      • What is the prognosis for pilonidal cysts?
    • Plague (Black Death) Plague is an infectious disease caused by the bacteria Yersinia pestis. Transmission to humans occurs via fleas that have bitten...learn more »
      In This Article
      Plague (Black Death) Article
      • Plague (Black Death) facts
      • What is plague? What is the history of plague?
      • What causes plague?
      • What are risk factors for plague?
      • What are plague symptoms and signs?
      • How do physicians diagnose plague?
      • What is the treatment for plague?
      • What is the prognosis of plague?
      • Is it possible to prevent plague?
      • What are modern concerns about plague?
    • Pneumonia Pneumonia is inflammation of the lungs caused by fungi, bacteria, or viruses. Symptoms and signs include cough, fever, shortness...learn more »
      In This Article
      Pneumonia Article
      • Pneumonia facts
      • What is pneumonia?
      • What are the different types of pneumonia?
      • What causes pneumonia?
      • What are risk factors for pneumonia?
      • What are pneumonia symptoms and signs?
      • How do doctors diagnose pneumonia?
      • What is the treatment for pneumonia?
      • What are complications of pneumonia?
      • What is the prognosis of pneumonia?
      • Is it possible to prevent pneumonia? Is there a pneumonia vaccine?
    • Rabies Rabies is a viral disease that is transmitted via the bite of an infected animal. Symptoms include fever, headaches, and...learn more »
      In This Article
      Rabies Article
      • Rabies facts
      • What is rabies?
      • What causes rabies?
      • What are risk factors for rabies?
      • What are rabies symptoms and signs?
      • How do physicians diagnose rabies?
      • What is the treatment for rabies?
      • What is the prognosis of rabies?
      • Is it possible to prevent rabies? Is there a rabies vaccine?
    • Respiratory Syncytial Virus Respiratory syncytial virus (RSV) is a highly contagious viral infection. Symptoms include fever and nasal congestion and...learn more »
      In This Article
      Respiratory Syncytial Virus Article
      • Respiratory syncytial virus (RSV) infection facts
      • What is the respiratory syncytial virus (RSV)?
      • When does RSV infection occur, and who gets it?
      • Who is at risk for severe disease?
      • Is RSV infection contagious, and how is RSV infection transmitted?
      • What are the symptoms of RSV infection?
      • How is RSV infection diagnosed?
      • What is the treatment for an RSV infection?
      • How can RSV infection be prevented?
      • Is there an RSV vaccine?
      • What is the prognosis of a respiratory syncytial virus infection?
    • Rheumatoid Arthritis Rheumatoid arthritis is an autoimmune disease that causes chronic inflammation of the joints, the tissue around the joints, as...learn more »
      In This Article
      Rheumatoid Arthritis Article
      • Rheumatoid arthritis (RA) facts
      • What is rheumatoid arthritis (RA)?
      • What are causes and risk factors of rheumatoid arthritis?
      • What are rheumatoid arthritis symptoms and signs?
      • What are complications of rheumatoid disease?
      • How do physicians diagnose rheumatoid arthritis?
      • What is the treatment for rheumatoid arthritis?
      • "First-line" rheumatoid arthritis medications
      • "Second-line" or "slow-acting" rheumatoid arthritis drugs
      • What are newer treatments for rheumatoid arthritis?
      • Rheumatoid arthritis diet and other treatments
      • What about rheumatoid arthritis and pregnancy?
      • What is the prognosis (outlook) for patients with rheumatoid arthritis?
      • Is it possible to prevent rheumatoid arthritis?
      • What research is being done on rheumatoid arthritis?
      • Where can people get additional information on rheumatoid arthritis?
    • 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?
      • What causes Rocky Mountain spotted fever?
      • What are Rocky Mountain spotted fever risk factors?
      • What are Rocky Mountain spotted fever symptoms and signs?
      • How do physicians diagnose Rocky Mountain spotted fever?
      • What is the treatment for Rocky Mountain spotted fever?
      • What is the prognosis of Rocky Mountain spotted fever?
      • Is it possible to prevent Rocky Mountain spotted fever?
    • Roseola Roseola is a viral illness that most commonly affects young children. Symptoms and signs include a sudden high fever that lasts...learn more »
      In This Article
      Roseola Article
      • Roseola facts
      • What is roseola?
      • What virus causes roseola?
      • How is roseola spread?
      • What are roseola symptoms and signs?
      • How is the diagnosis of roseola established?
      • How high can the fever go with roseola?
      • What is the treatment for the fever of roseola?
      • Can the fever cause a seizure?
      • Is a seizure due to fever dangerous?
      • What should I do if my child with roseola has a seizure?
      • Is there a rash with roseola?
      • What is most remarkable characteristic of roseola?
      • What is the course of roseola?
      • Are there any complications of roseola?
      • Should I take my child to the doctor with roseola?
      • When can the child return to child care?
      • Is it possible to prevent roseola?
      • What is the prognosis for a child with roseola?
      • Are there other names for roseola?
    • 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 infection?
      • What are risk factors for rotavirus infection?
      • What are rotavirus symptoms and signs?
      • How is rotavirus spread?
      • How is rotavirus diagnosed?
      • How is rotavirus treated?
      • What is the prognosis of rotavirus infection?
      • Can rotavirus infection be prevented with a vaccine? 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 food poisoning?
      • What are risk factors for Salmonella food poisoning?
      • What are symptoms and signs of Salmonella 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?
    • Sarcoidosis Sarcoidosis, a disease resulting from chronic inflammation, causes small lumps (granulomas) to develop in a great range of body...learn more »
      In This Article
      Sarcoidosis Article
      • Sarcoidosis facts
      • What is sarcoidosis?
      • What are symptoms of sarcoidosis?
      • Who gets sarcoidosis?
      • What we know about sarcoidosis
      • Some things we don't know about sarcoidosis
      • How is sarcoidosis diagnosed?
      • What are some signs and symptoms that suggest possible sarcoidosis?
      • What do laboratory tests show?
      • How is sarcoidosis treated?
      • Living with sarcoidosis
      • Where can a person find more information on sarcoidosis?
    • SARS Severe acute respiratory syndrome (SARS) is a respiratory disease caused by the coronavirus SARS-CoV. Symptoms include fever and...learn more »
      In This Article
      SARS Article
      • Severe acute respiratory syndrome (SARS) facts
      • What is severe acute respiratory syndrome (SARS)?
      • What causes SARS? How is SARS transmitted?
      • What are risk factors for SARS?
      • What are SARS symptoms and signs?
      • How is SARS diagnosed?
      • What is the treatment for SARS?
      • What is the prognosis of SARS?
      • Is it possible to prevent SARS?
      • Is there a SARS vaccine? What research is being done on SARS?
      • Where can people get more information about SARS?
    • 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?
    • Smallpox Smallpox is a disease caused by the variola virus. Symptoms and signs include a characteristic rash and high fever. Treatment...learn more »
      In This Article
      Smallpox Article
      • Smallpox facts
      • What is smallpox?
      • What is the history of smallpox?
      • What causes smallpox?
      • How is smallpox transmitted?
      • What are smallpox symptoms and signs?
      • How is smallpox diagnosed?
      • What is the treatment for smallpox?
      • Can smallpox be prevented with a vaccine?
      • What is the prognosis for smallpox, and what are complications of smallpox?
      • Where can people find more information on smallpox?
    • Sore Throat Sore throats are generally described as pain or discomfort in the throat area. A sore throat may be caused by bacterial or viral...learn more »
      In This Article
      Sore Throat Article
      • Definition of a sore throat
      • What is the difference between sore throat and strep throat?
      • What are the causes of sore throat?
      • What are the signs and symptoms of a sore throat?
      • Is a sore throat contagious?
      • When should I see a doctor for a sore throat?
      • How is the diagnosis of sore throat made?
      • What are home remedies to soothe a sore throat?
      • What OTC medications will soothe a sore throat?
      • Are antibiotics necessary for a sore throat?
      • How can I prevent a sore throat?
    • Staph Infection (Staphylococcus Aureus) Staphylococcus or Staph is a group of bacteria that can cause a multitude of diseases. Staph infections can cause illness...learn more »
      In This Article
      Staph Infection (Staphylococcus Aureus) Article
      • Staph infection facts
      • What is Staphylococcus?
      • Who is at risk for Staph infections?
      • What are the symptoms and signs of a Staph infection?
      • What types of diseases are caused by Staph?
      • How are Staph infections diagnosed?
      • What is the treatment for Staph infections?
      • What is antibiotic-resistant Staph aureus?
      • What are complications of Staph infections?
      • Can Staph infections be prevented?
      • What is the prognosis for Staph infections?
    • STDs in Men Sexually transmitted diseases (STDs) are infections transmitted during sexual contact. They may be caused by viruses, bacteria,...learn more »
      In This Article
      STDs in Men Article
      • What are sexually transmitted diseases (STDs)
      • Who is at risk for STDs?
      • What causes STDs?
      • What are the signs and symptoms of STDs?
      • List of STDs in men
      • Chlamydia
      • Gonorrhea
      • Trichomoniasis
      • HIV
      • Genital herpes
      • Genital warts (HPV)
      • Hepatitis
      • Syphilis
      • How are STDs diagnosed?
      • What is the treatment for STDs?
      • What is the prognosis for STDs?
      • Can STDs be prevented?
    • Strep Throat Strep throat (Group A, beta hemolytic, streptococcus pyogene, GAS) bacterial infection of the throat. Signs and symptoms of strep...learn more »
      In This Article
      Strep Throat Article
      • What is strep throat and what causes strep throat?
      • What are the signs and symptoms of strep throat?
      • Are the signs and symptoms of strep throat different in various age groups?
      • Is strep throat contagious?
      • How is the diagnosis of strep throat established?
      • What are home remedies, OTC, and medical treatments for strep throat?
      • What are the potential complications of strep throat?
      • How can I prevent contracting strep throat?
      • Strep throat facts
    • 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?
      • 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 complications are seen with group A streptococcal infections?
      • Can group A streptococcal infections be prevented?
      • What is the prognosis for group A streptococcal infections?
      • Where can people find more information about group A streptococcal infections?
    • Swimmer's Ear Swimmer's ear (external otitis) is an infection of the skin that covers the outer ear canal. Causes of swimmer's ear include...learn more »
      In This Article
      Swimmer's Ear Article
      • Swimmer's ear facts
      • What is "swimmer's ear" infection or acute external otitis?
      • What are symptoms of swimmer's ear?
      • What is chronic swimmer's ear?
      • What is the treatment for swimmer's ear?
      • How can swimmer's ear be prevented?
      • What is the prognosis for swimmer's ear?
      • What about swimmer's ear in children?
      • Why do ears itch?
      • What should I do if I get a foreign object or insect in my ear?
    • 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 H3N2v influenza virus) facts
      • What is the swine flu?
      • What causes swine flu?
      • Why is swine flu now infecting humans?
      • What are the symptoms of swine flu?
      • How is swine flu diagnosed?
      • What is the treatment for swine flu?
      • What is the history of swine flu?
      • What are the risk factors for swine flu?
      • Can swine flu be prevented with a vaccine?
      • Can swine flu be prevented if the a flu vaccine (or other flu strain vaccine) is not readily available?
      • 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?
    • Thymoma Thymoma is an uncommon cancer of the thymus gland. Many thymomas are asymptomatic. When symptoms do occur, they include chest...learn more »
      In This Article
      Thymoma Article
      • Thymoma facts
      • What is thymoma?
      • What causes thymoma, and what are risk factors for thymoma?
      • What are signs and symptoms of thymoma?
      • What other medical conditions are associated with thymoma?
      • How is thymoma diagnosed?
      • What are the stages of thymoma?
      • What is the treatment for thymoma?
      • What is the prognosis for thymoma?
      • Can thymoma 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?
    • Toxoplasmosis Toxoplasmosis (toxo) is a parasitic infection that causes flulike symptoms, swollen lymph nodes, and muscle aches and pains that...learn more »
      In This Article
      Toxoplasmosis Article
      • Toxoplasmosis facts
      • What is toxoplasmosis?
      • What is the cause of toxoplasmosis?
      • What factors increase the risk of acquiring toxo?
      • What are the usual symptoms of toxoplasmosis?
      • Why do some people develop severe problems from toxo?
      • Can toxoplasmosis develop into a more serious illness in babies?
      • What is meant by a baby developing "a more severe case of toxo"?
      • How is toxo diagnosed in the lab?
      • How can toxoplasmosis be prevented?
      • Am I able to keep my cat?
      • Once infected with toxo, is my cat always able to spread the infection to me?
      • What is the treatment for toxoplasmosis?
      • What is the prognosis for toxoplasmosis?
    • Travel Medicine Travelers should prepare for their trip by visiting their physician to get the proper vaccinations and obtain the necessary...learn more »
      In This Article
      Travel Medicine Article
      • Why should travelers see a physician before they leave on a trip?
      • What diseases occur in travelers, and how can disease be prevented?
      • Traveler's diarrhea
      • Malaria
      • Meningococcal meningitis
      • Yellow fever
      • Hepatitis A
      • Typhoid fever
      • Polio
      • Cholera
      • What about diseases for which there is no vaccine or preventive medication?
      • What is safe to eat and drink while traveling?
      • What can I do to avoid insect bites?
      • What should be in my travel first aid kit?
      • What are the medical concerns with jet lag?
      • What if I have a medical condition or chronic disease?
      • What if I'm pregnant?
      • What about traveling with children?
      • Where can I find additional information?
    • Typhoid Fever Typhoid fever is an illness caused by the Salmonella typhi bacteria. The illness is contracted by ingesting the bacteria in...learn more »
      In This Article
      Typhoid Fever Article
      • Typhoid fever facts
      • What is typhoid fever? What is the history of typhoid fever?
      • How do patients get typhoid fever?
      • How do the bacteria cause disease, and how is it diagnosed?
      • What are typhoid fever symptoms?
      • What is the treatment for typhoid fever, and what is the prognosis?
      • Can typhoid fever be prevented?
    • 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?
    • Urinary Tract Infections (UTIs) A urinary tract infection (UTI) is an infection of the bladder, kidneys, ureters, or urethra. E. coli, a type of bacteria that...learn more »
      In This Article
      Urinary Tract Infections (UTIs) Article
      • What is a urinary tract infection (UTI)?
      • What causes a urinary tract infection?
      • What are urinary tract infection symptoms and signs?
      • When should people seek medical care for a UTI?
      • How do physicians diagnose a urinary tract infection?
      • Are there home remedies for a urinary tract infection?
      • What is the treatment for a urinary tract infection?
      • What follow-up is needed for a urinary tract infection?
      • Is it possible to prevent a urinary tract infection?
      • What is the prognosis of a urinary tract infection?
    • Vancomycin-Resistant Enterococci (VRE) Vancomycin-resistant enterococci (VRE) infection is the most common type of infection acquired by patients while hospitalized....learn more »
      In This Article
      Vancomycin-Resistant Enterococci (VRE) Article
      • Vancomycin-resistant enterococci (VRE) facts
      • What are vancomycin-resistant enterococci (VRE)?
      • What causes a vancomycin-resistant enterococcal (VRE) infection?
      • What are risk factors for vancomycin-resistant enterococci (VRE) infections?
      • How are vancomycin-resistant enterococci (VRE) transmitted?
      • What are the symptoms and signs of a vancomycin-resistant enterococcal (VRE) infection?
      • How do physicians diagnose vancomycin-resistant enterococcal (VRE) infections?
      • What is the treatment for a vancomycin-resistant enterococcal (VRE) infection?
      • What is the prognosis of a vancomycin-resistant enterococcal (VRE) infection?
      • What are the complications of VRE infections?
      • Is it possible to prevent vancomycin-resistant enterococci (VRE) infections?
      • What precautions should people take when tending to someone with a vancomycin-resistant enterococcal infection?
      • What research is being done on vancomycin-resistant enterococci (VRE)?
      • Where can people find more information on vancomycin-resistant enterococci (VRE) infections?
    • West Nile Virus West Nile virus (West Nile encephalitis) is a brain infection caused by a virus. People become infected with the virus after...learn more »
      In This Article
      West Nile Virus Article
      • West Nile virus facts
      • What is the history of West Nile virus?
      • Where did the West Nile virus come from?
      • How do people get West Nile virus?
      • How do mosquitoes get infected with the West Nile virus?
      • Can one person contract the virus from another?
      • Besides mosquitoes, can other insects transmit the West Nile virus?
      • Are there other viruses like the West Nile virus?
      • What are West Nile virus symptoms and signs?
      • When is there an increased risk for infection?
      • Who is at risk for getting West Nile virus?
      • What is the treatment for West Nile virus? Can West Nile virus be prevented with a vaccine?
      • Is a woman's pregnancy at risk if she gets West Nile virus?
      • What can a community do to reduce the risk of an outbreak of the West Nile virus?
      • What can a person do to reduce the risk of becoming infected with the West Nile virus?
    • Whooping Cough (Pertussis) Whooping cough (pertussis) is highly contagious respiratory infection that is caused by the bacteria Bordetella pertussis. There...learn more »
      In This Article
      Whooping Cough (Pertussis) Article
      • Whooping cough (pertussis) facts
      • What is whooping cough? What is the history of whooping cough?
      • What causes whooping cough?
      • What are risk factors for whooping cough?
      • Can whooping cough be prevented with a vaccine?
      • What are whooping cough symptoms, signs, and stages?
      • How is whooping cough transmitted?
      • Can adults get whooping cough?
      • How is whooping cough diagnosed?
      • What is the treatment for whooping cough?
      • What is the prognosis for whooping cough?
      • What are possible complications of whooping cough?
      • Where can people find more information about whooping cough (pertussis)?
    • 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?
      • What are yellow fever symptoms and signs?
      • How is yellow fever diagnosed?
      • What is the treatment for yellow fever?
      • What is the prognosis for people with yellow fever?
      • Can yellow fever be prevented?
      • Where can people get more information on yellow fever?
Other Causes of Fever
  • Abscess
  • Bacterial Infection
  • Medications (Both Prescription and Nonprescription)
  • Parasite Infection
  • Virus Infection
Examples of Medications for Fever