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Caffeine may be found in beverages, supplements, and medications. Common food sources include coffee, chocolate, green tea, and soft drinks.

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Related Diseases & Conditions

  • Muscle Spasms Muscle spasms are involuntary muscle contractions that come on suddenly and are usually quite painful. Dehydration, doing...learn more »
  • Iron Deficiency Iron is a mineral our bodies need. Iron deficiency is a condition resulting from not enough iron in the body. It is the most...learn more »
    In This Article
    Iron Deficiency Article
    • Iron and iron deficiency facts*
    • What is iron and why do we need it?
    • What is iron deficiency and why is it a concern?
    • What causes iron deficiency?
    • Who is most at risk for iron deficiency?
    • What are the signs and symptoms of iron deficiency?
    • How is iron deficiency diagnosed?
    • How is iron deficiency treated?
    • Can iron deficiency be prevented?
    • Babies
    • Young children (aged 1-5 years)
    • Adolescent girls and women of childbearing age
    • Pregnant women
    • How much iron do I need?
    • What are dietary sources of iron?
    • Dietary sources of Vitamin C
    • Iron overload and hemochromatosis
  • Migraine Headache Migraine headaches are severe headaches that are accompanies to sensitivity to light, sounds, and smells. They are often...learn more »
    In This Article
    Migraine Headache Article
    • Migraine headache facts
    • What is a migraine?
    • What are migraine triggers?
    • What causes migraines?
    • What are the risk factors for migraine?
    • What are the signs and symptoms of migraines?
    • How are migraines diagnosed?
    • What is the treatment for migraines?
    • Migraine medications
    • What self-care treatment and lifestyle changes work for migraines?
    • How are migraines managed during pregnancy?
    • How are migraines managed in children?
    • What is the prognosis for migraines?
    • Can migraines be prevented?
  • 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?
    • How do you get rid of a headache? Are home remedies effective for headaches?
  • Anxiety Anxiety is a feeling of apprehension and fear characterized by symptoms such as trouble concentrating, headaches, sleep problems,...learn more »
    In This Article
    Anxiety Article
    • Generalized anxiety disorder facts
    • What is anxiety?
    • What are the types of anxiety disorders?
    • What are anxiety symptoms and signs?
    • What is generalized anxiety disorder (GAD)?
    • How common is generalized anxiety disorder?
    • Are other mental health diagnoses associated with generalized anxiety disorder?
    • What are causes and risk factors for generalized anxiety disorder?
    • How do health-care professionals diagnose generalized anxiety disorder (GAD)?
    • What types of specialists treat generalized anxiety disorder?
    • 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?
  • Restless Leg Syndrome Restless leg syndrome (RLS or restless legs syndrome) is a common cause for painful legs that typically eases with motion, and...learn more »

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