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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

  • 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 definition and 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?
    • 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?
  • Muscle Spasms Muscle spasms are involuntary muscle contractions that come on suddenly and are usually quite painful. Dehydration, doing...learn more »
  • Heartburn (Acid Reflux) Heartburn is a burning sensation experienced from acid reflux (GERD). Symptoms of heartburn include chest pain, burning in...learn more »
    In This Article
    Heartburn (Acid Reflux) Article
    • Heartburn facts
    • What is the definition of heartburn?
    • What causes heartburn?
    • What does acid reflux look like?
    • What are the symptoms of heartburn?
    • Foods and beverages to avoid
    • How is heartburn diagnosed?
    • What are treatments, relief, and home remedies for heartburn?
    • Lifestyle changes
    • OTC and prescription medications for heartburn
    • Surgical procedures to treat heartburn
    • Heartburn during pregnancy
    • How can heartburn be prevented?
  • 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?
  • Hoarseness Hoarseness (abnormal deep, harsh, raspy voice) is caused by a variety of conditions in which the larynx (voice box and vocal...learn more »
    In This Article
    Hoarseness Article
    • Hoarseness facts
    • What is hoarseness?
    • What causes hoarseness?
    • What are the signs and symptoms of hoarseness?
    • How are the causes of hoarseness diagnosed?
    • What is the treatment for hoarseness?
    • How is hoarseness prevented?

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