Chronic Fatigue Syndrome Related Diseases & Conditions

Medical conditions are often related to other diseases and conditions. Our doctors have compiled a list of ailments related to the topic of Chronic Fatigue Syndrome. These conditions may be a cause or symptom of Chronic Fatigue Syndrome or be a condition for which you may be at increased risk.

  • Headache Headaches can be divided into two categories: primary headaches and secondary headaches. Migraine headaches, tension headaches,...learn more »
    In This Article
    Headache Article
    • Headache facts
    • What is a headache?
    • How are headaches classified?
    • What are primary headaches?
    • What are secondary headaches?
    • What are cranial neuralgias, facial pain, and other headaches?
    • What causes tension headaches?
    • What are the 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?
  • Pregnancy (Week By Week, Trimesters) There are many symptoms involved in the 1st, 2nd and 3rd trimesters of pregnancy. The first early pregnancy symptom is typically...learn more »
    In This Article
    Pregnancy (Week By Week, Trimesters) Article
    • Pregnancy facts*
    • Introduction
    • What is the first trimester (week 1-week 12)?
    • What is the second trimester (week 13-week 28)?
    • What is the third trimester (week 29-week 40)?
    • How will my baby develop week by week?
    • What are the changes that happen to a woman's body during her 1st, 2nd, and 3rd trimesters of pregnancy?
    • Body aches
    • Breast changes
    • Constipation
    • Dizziness
    • Fatigue, sleep problems
    • Heartburn and indigestion
    • Hemorrhoids during pregnancy
    • Itching
    • Leg cramps
    • Morning sickness
    • Nasal problems
    • Numb or tingling hands
    • Stretch marks, skin changes
    • Swelling
    • Urinary frequency and leaking
    • Varicose veins
  • Diarrhea Diarrhea is a change is the frequency and looseness of bowel movements. Cramping, abdominal pain, and the sensation of rectal...learn more »
    In This Article
    Diarrhea Article
    • Diarrhea facts
    • What is diarrhea?
    • How is diarrhea defined?
    • Why does diarrhea develop?
    • What symptoms are associated with diarrhea?
    • What are common causes of acute diarrhea?
    • Viral gastroenteritis
    • Food poisoning
    • Traveler's diarrhea
    • Bacterial enterocolitis
    • Parasites
    • Drugs
    • What are common causes of chronic diarrhea?
    • What are the complications of diarrhea?
    • When should the doctor be called for diarrhea?
    • What tests are useful in the evaluation of diarrhea?
    • How can dehydration be prevented and treated?
    • What is the treatment for diarrhea?
    • When should antibiotics be used for diarrhea?
  • Menopause Menopause is the time in a woman's life when menstrual periods permanently stop, also called the "change of life." Menopause...learn more »
    In This Article
    Menopause Article
    • Menopause facts
    • What is menopause?
    • At what age does a woman typically reach menopause?
    • What conditions can affect the timing of menopause?
    • What are the symptoms of menopause?
    • What are the complications and effects of menopause on chronic medical conditions?
    • Are hormone levels or other blood tests helpful in detecting menopause?
    • What are the treatment options for the symptoms of menopause?
    • Hormone therapy for menopause
    • Other medical therapies for menopause
    • Alternative therapies for menopause
    • Non-hormone therapies for menopause
    • Lifestyle factors in managing menopause symptoms
  • 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?
  • Abdominal Pain (Causes, Remedies, Treatment) Abdominal pain can have many causes. Some of the less serious causes include bloating, gas, colitis, endometriosis, food...learn more »
    In This Article
    Abdominal Pain (Causes, Remedies, Treatment) Article
    • Definition of abdominal pain
    • What are the ways to describe abdominal pain?
    • What are the causes of abdominal pain?
    • What are the less serious causes of abdominal pain?
    • What are more serious causes of abdominal pain?
    • When should I call my doctor about abdominal pain?
    • What are the methods used to diagnose abdominal pain?
    • What are the home remedies for certain causes of abdominal pain?
    • What medications can be used to treat certain causes of abdominal pain?
    • What lifestyle choices can I make to prevent abdominal pain?
  • Night Sweats Night sweats are severe hot flashes that occur at night and result in a drenching sweat. In order to distinguish night sweats...learn more »
    In This Article
    Night Sweats Article
    • Introduction to night sweats
    • What are the causes of night sweats in women, men, and children?
    • What are the symptoms of night sweats?
    • Menopause
    • Idiopathic hyperhidrosis
    • Infections
    • Cancer
    • Medications
    • Hypoglycemia
    • Hormone disorders
    • Neurologic conditions
    • Night sweats treatment
  • Dizziness Dizziness is a symptom that is often applies to a variety of sensations including lightheadedness and vertigo. Causes of...learn more »
    In This Article
    Dizziness Article
    • Dizziness facts
    • Introduction to dizziness (feeling dizzy)
    • What are some common causes of dizziness?
    • Low blood pressure
    • Postural or orthostatic hypotension
    • High blood pressure
    • Diabetes
    • Endocrine diseases
    • Hyperventilation
    • Heart conditions
    • Vasovagal syncope
    • Dizziness and vertigo
    • What are the symptoms experienced when a person feels dizzy?
    • When should I call the doctor for dizziness?
    • How is dizziness diagnosed?
    • How is dizziness/vertigo diagnosed?
    • How is dizziness treated?
  • Anxiety Anxiety is a feeling of apprehension and fear characterized by physical symptoms. Anxiety disorders are serious medical illnesses...learn more »
    In This Article
    Anxiety Article
    • Generalized anxiety disorder facts
    • What is generalized anxiety disorder (GAD)?
    • What are the different types of anxiety?
    • How common is generalized anxiety disorder?
    • What are causes and risk factors for anxiety?
    • What are anxiety symptoms and signs?
    • How is generalized anxiety disorder diagnosed?
    • What is the treatment for anxiety?
    • What are the side effects of anxiety medications?
    • What are complications of generalized anxiety disorder?
    • Is it possible to prevent anxiety?
    • What is the prognosis of generalized anxiety disorder?
    • Are there support groups for those with generalized anxiety disorder?
    • Where can people find additional information on generalized anxiety disorder?
  • Chest Pain Chest pain is a common complaint by a patient in the ER. Causes of chest pain include broken or bruised ribs, pleurisy,...learn more »
    In This Article
    Chest Pain Article
    • Chest pain facts
    • Chest pain introduction
    • What are the sources of chest pain?
    • What are the causes of chest pain?
    • How is chest pain diagnosed?
    • What is the philosophy of the approach to chest pain diagnosis?
    • What is the diagnosis and treatment for chest pain?
    • Broken or bruised ribs
    • Costochondritis
    • Pleuritis or pleurisy
    • Pneumothorax
    • Shingles
    • Pneumonia
    • Pulmonary embolism
    • Angina and heart attack (myocardial infarction)
    • Pericarditis
    • Aorta and aortic dissection
    • Esophagus and reflux esophagitis
    • Referred abdominal pain
  • Cough Chronic cough is a cough that does not go away and is generally a symptom of another disorder such as asthma, allergic rhinitis,...learn more »
    In This Article
    Cough Article
    • What is chronic cough?
    • What are causes of chronic cough?
    • What are the different types of coughs?
    • How is chronic cough treated?
    • Are there home remedies for chronic cough?
    • Can chronic cough be prevented?
  • Panic Attacks Panic attacks are sudden feelings of terror that strike without warning. These episodes can occur at any time, even during sleep....learn more »
    In This Article
    Panic Attacks Article
    • Panic attack facts
    • What are panic attacks?
    • What are panic attack symptoms and signs in adults, teenagers, and children?
    • Are panic attacks serious?
    • What are causes and risk factors for panic attacks?
    • How is panic disorder diagnosed?
    • What is the treatment for panic attacks? What medications treat panic attacks?
    • What are complications of untreated panic attacks?
    • What is the prognosis for panic disorder?
    • How are panic attacks prevented?
  • Ear Infection (Otitis Media) Middle ear infection or inflammation (otitis media) is inflammation fo the middle ear. There are two types of otitis media, acute...learn more »
    In This Article
    Ear Infection (Otitis Media) Article
    • Otitis media (ear infection or inflammation) facts
    • What is otitis media?
    • What are the symptoms of acute middle ear infection?
    • "Are ear infections contagious?
    • How common is acute otitis media?
    • Why do young children tend to have middle ear infections or inflammation?
    • How does the Eustachian tube change as a child gets older?
    • What microorganisms cause otitis media?
    • What is the relationship between bottlefeeding and middle ear infection or inflammation?
    • What are the risk factors for acute middle ear infection or inflammation?
    • How is otitis media diagnosed?
    • How is acute middle ear infection or inflammation treated?
    • Are there any home remedies for acute ear infection (otitis media)?
    • What causes chronic middle ear infection or inflammation?
    • What happens to the eardrum in chronic middle ear infection or inflammation?
    • What happens to the eardrum if a hole develops in the eardrum?
    • How is chronic middle ear infection or inflammation treated?
    • What are the goals of otitis media surgery?
    • What is serious middle ear infection or inflammation?
    • What limitations are there on a child with middle ear infection or inflammation?
    • Can otitis media (middle ear infection or inflammation) be prevented?
  • 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?
  • Fatigue Fatigue can be described in various ways. Sometimes fatigue is described as feeling a lack of energy and motivation (both mental...learn more »
    In This Article
    Fatigue Article
    • Fatigue Facts
    • Fatigue introduction
    • What causes fatigue?
    • What are the signs and symptoms of fatigue?
    • How is the cause of fatigue diagnosed?
    • What is the treatment for fatigue?
    • Can fatigue be prevented?
  • Depression Depression is an illness that involves the body, mood, and thoughts and affects the way a person eats and sleeps, the way one...learn more »
    In This Article
    Depression Article
    • Depression facts
    • What is a depressive disorder?
    • What are myths about depression?
    • What are the types of depression, and what are depression symptoms and signs?
    • Depression symptoms and signs in men
    • Depression symptoms and signs in women
    • Depression symptoms and signs in teenagers
    • Depression symptoms and signs in children
    • What are the causes and risk factors of depression?
    • Postpartum depression
    • How is depression diagnosed?
    • What treatments are available for depression?
    • What is the general approach to treating depression?
    • What about sexual dysfunction related to antidepressants?
    • What about discontinuing antidepressants?
    • What are complications of depression?
    • What is the prognosis for depression?
    • How can depression be prevented?
    • What about self-help and home remedies?
    • How can someone help a person who is depressed?
    • Where can one seek help for depression?
    • What is in the future for depression?
    • Where can people find more information about depression?
  • Nausea and Vomiting Nausea is an uneasiness of the stomach that often precedes vomiting. Nausea and vomiting are not diseases, but they are symptoms...learn more »
    In This Article
    Nausea and Vomiting Article
    • Nausea and vomiting facts
    • Introduction to nausea and vomiting
    • What causes nausea or vomiting?
    • Acute gastritis and nausea and vomiting
    • Central causes of nausea and vomiting
    • Nausea and vomiting associated with illness
    • Nausea and vomiting from medications and medical treatments
    • Nausea and vomiting and bowel obstruction
    • Nausea and vomiting in pregnancy (morning sickness)
    • Vomiting in infants
    • What are home remedies for nausea or vomiting?
    • When should I call the doctor regarding nausea and vomiting?
    • How is the source of nausea or vomiting diagnosed?
    • What is the treatment for nausea and vomiting?
  • Fibromyalgia Fibromyalgia is a chronic pain condition characterized by symptoms such as fatigue, sleep disturbances, and tender points. Stress...learn more »
    In This Article
    Fibromyalgia Article
    • Fibromyalgia facts
    • What is fibromyalgia?
    • What causes fibromyalgia?
    • Is fibromyalgia hereditary?
    • What are risk factors for fibromyalgia?
    • What are fibromyalgia symptoms and signs?
    • How do physicians diagnose fibromyalgia?
    • What is the treatment for fibromyalgia?
    • Are there any home remedies for fibromyalgia?
    • Does diet or exercise affect fibromyalgia?
    • What is the prognosis of fibromyalgia?
    • Is it possible to prevent fibromyalgia?
    • Are there support groups for fibromyalgia?
    • What is the latest research on fibromyalgia?
  • Chronic Pain Chronic pain is pain (an unpleasant sense of discomfort) that persists or progresses over a long period of time. In contrast to...learn more »
    In This Article
    Chronic Pain Article
    • Chronic pain facts*
    • Introduction to chronic pain
    • The A to Z of pain
    • How is pain diagnosed?
    • How is pain treated?
    • Pain management
    • What is the role of age and gender in pain?
    • A pain primer: what do we know about pain?
    • What is the future of pain research?
    • Appendix
    • Spine basics: the vertebrae, discs and spinal cord
    • The nervous system
    • Phantom pain: how does the brain feel?
    • Chili peppers, capsaicin and pain
    • Marijuana for pain treatment
    • Nerve blocks for pain treatment
    • Where can I get more information about pain?
  • Stress Stress occurs when forces from the outside world impinge on the individual. Stress is a normal part of life. However,...learn more »
    In This Article
    Stress Article
    • Stress facts
    • What is stress?
    • A brief history of stress
    • What are the signs and symptoms of poorly managed stress?
    • Who is most vulnerable to stress?
    • Teen stress
    • What is the healthy response to stress?
    • How does the response to stress work?
    • What is the role of the hypothalamus-pituitary-adrenal (HPA) axis (grouping) in stress?
    • What is the role of the locus coeruleus in stress?
    • How do the connections in the brain work in stress?
    • What do we know about using (activating) and overusing our internal systems that respond to stress?
    • What are the effects of stress on medical and psychological conditions?
    • Conclusions about the effects of stress
    • What can people do for stress management?
    • What's in the future for stress?
  • Myofascial Pain Syndrome Myofascial pain syndrome is muscle pain in the body's soft tissues due to injury or strain. Symptoms include muscle pain with...learn more »
    In This Article
    Myofascial Pain Syndrome Article
    • Myofascial pain syndrome facts
    • What is myofascial pain syndrome?
    • What are causes and risk factors for myofascial pain syndrome?
    • What are myofascial pain syndrome symptoms and signs?
    • How is myofascial pain syndrome diagnosed?
    • What is the treatment for myofascial pain syndrome?
    • What is the prognosis of myofascial pain syndrome?
    • Can myofascial pain syndrome be prevented?
  • Orthostatic Hypotension Orthostatic hypotension symptoms include lightheadedness, weakness, blurred vision, and syncope or passing out. Causes of...learn more »
    In This Article
    Orthostatic Hypotension Article
    • Orthostatic hypotension facts
    • What is orthostatic hypotension?
    • What causes orthostatic hypotension?
    • What are the risk factors for orthostatic hypotension?
    • What are the symptoms of orthostatic hypotension?
    • When should I call the doctor for orthostatic hypotension?
    • How is orthostatic hypotension diagnosed?
    • What is the treatment for orthostatic hypotension?
    • What are the complications of orthostatic hypotension?
    • How can orthostatic hypotension be prevented?
  • Head and Neck Cancer Head and neck cancer is cancer of the oral cavity, salivary glands, paranasal sinuses and nasal cavity, pharynx, larynx, or lymph...learn more »
    In This Article
    Head and Neck Cancer Article
    • Head and neck cancer facts*
    • What is cancer?
    • What kinds of cancers are considered cancers of the head and neck?
    • How common are head and neck cancers?
    • What causes head and neck cancers?
    • What are common symptoms of head and neck cancers?
    • How are head and neck cancers diagnosed?
    • What health professionals treat patients with head and neck cancers?
    • How are head and neck cancers treated?
    • Are clinical trials (research studies) available for patients with head and neck cancers?
    • What rehabilitation or support options are available for patients with head and neck cancers?
    • Is follow-up treatment necessary? What does it involve?
    • What can people who have had head and neck cancer do to reduce the risk of developing a second primary (new) cancer?
  • Double Vision Double vision (diplopia) is a symptom that my indicate Graves' disease, myasthenia gravis, stroke, multiple sclerosis,...learn more »
    In This Article
    Double Vision Article
    • What is double vision?
    • What causes double vision?
    • What are the symptoms and signs of double vision?
    • How is the cause of double vision diagnosed?
    • What is the treatment for double vision?
    • Can double vision be prevented?
    • What is the prognosis for double vision?
  • Schizophrenia Schizophrenia is a disabling brain disorder that may cause hallucinations and delusions and affect a person's ability to...learn more »
    In This Article
    Schizophrenia Article
    • Schizophrenia facts
    • What is schizophrenia?
    • What are the different types of schizophrenia?
    • How common is schizophrenia in children?
    • What is the history of schizophrenia?
    • What are causes of schizophrenia? Is it hereditary?
    • What are schizophrenia symptoms and signs?
    • How is schizophrenia diagnosed?
    • What are treatments for schizophrenia and the side effects of those treatments?
    • What is the prognosis for schizophrenia?
    • What research is being done on schizophrenia?
    • Where can people get more information about schizophrenia?
  • Sleep A number of vital tasks carried out during sleep help maintain good health and enable people to function at their best. Sleep...learn more »
    In This Article
    Sleep Article
    • What is sleep?
    • What are the stages of sleep?
    • How much sleep does a person need?
    • Does the amount of sleep we need change as we age?
    • What are signs and symptoms of sleep deprivation?
    • What are and what causes sleep disorders?
    • How are sleep problems diagnosed?
    • How are sleep problems treated?
    • Sleep hygiene
    • Other therapies
    • Sleep aids (prescription and OTC)
    • Are sleep problems and disease related?
    • How can I get a good night's sleep?
  • Insomnia Insomnia is the perception or complaint of inadequate or poor-quality sleep because of difficulty falling asleep; waking up...learn more »
    In This Article
    Insomnia Article
    • Insomnia facts
    • What is insomnia?
    • What causes insomnia?
    • What are the risk factors for insomnia?
    • What acute situational and stress factors cause insomnia?
    • What are the symptoms of insomnia?
    • When should I call the doctor about insomnia?
    • How is insomnia diagnosed?
    • How is insomnia treated?
    • What are non-medical treatments for insomnia?
    • What is sleep hygiene?
    • How can stimulus control help with insomnia?
    • What is sleep restriction?
    • What medications are used to treat insomnia?
    • What is the outlook for insomnia?
  • Narcolepsy Narcolepsy, a chronic disease of the central nervous system causes have not been fully determined. Some theories include...learn more »
    In This Article
    Narcolepsy Article
    • Narcolepsy facts
    • What is narcolepsy?
    • How common is narcolepsy?
    • What causes narcolepsy?
    • What are the symptoms of narcolepsy?
    • Excessive daytime sleepiness (EDS)
    • Cataplexy
    • Hypnagogic hallucinations
    • Sleep paralysis
    • Additional symptoms
    • How is narcolepsy diagnosed?
    • How is narcolepsy treated?
    • Medications
    • Non-drug treatments
    • What is the outcome (prognosis) for patients with narcolepsy?
    • What's in the future for narcolepsy?
    • For more information
  • Chronic Fatigue Syndrome Second Source article from Government...learn more »
  • Fitness Regular physical activity can reduce the risk of disease. Regular exercise can also reduce the symptoms of stress and anxiety....learn more »
    In This Article
    Fitness Article
    • The importance of physical activity and fitness
    • Why should I be active?
    • Can everyone benefit from physical activity?
    • What are the recommendations for increasing fitness for youth, adults, and seniors?
    • How do I get started with a fitness plan?
    • When is a medical evaluation necessary?
    • How can I make physical activity a part of my life?
    • What are the components of physical fitness?
    • Fitness terms
  • Teens Teenagers recognize that they are developmentally between child and adult. Teen health prevention includes maintaining a healthy...learn more »
    In This Article
    Teens Article
    • What's involved with teen disease prevention?
    • What can teens expect during health checkups?
    • What immunizations do teenagers need?