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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 »
  • 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?
  • 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?
  • 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 »
    In This Article
    Restless Leg Syndrome Article
    • Restless leg syndrome facts
    • What is restless leg syndrome (RLS)?
    • What causes restless leg syndrome?
    • What are the symptoms of restless leg syndrome?
    • How is restless leg syndrome diagnosed?
    • Can other conditions mimic restless leg syndrome?
    • What is the treatment for restless leg syndrome?
    • What medications are used to treat restless leg syndrome?
    • Are there any remedies or complimentary/alternative treatments for restless leg syndrome?
  • 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
  • Heat Stroke Heat stroke (heatstroke or sun stroke) is a form of hyperthermia. Heat stroke is a true medical emergency that can be fatal if...learn more »
    In This Article
    Heat Stroke Article
    • Heat stroke facts
    • What is, and who is at risk for heat stroke?
    • What are heat stroke symptoms and signs?
    • What about heat stroke in children?
    • How do you treat a heat stroke victim?
    • How can heat stroke be prevented?

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