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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 »
  • Osteoporosis Learn about osteoporosis, a condition characterized by the loss of bone density, which leads to an increased risk of bone...learn more »
    In This Article
    Osteoporosis Article
    • Osteoporosis facts
    • What is osteoporosis?
    • What are osteoporosis causes and risk factors?
    • What are osteoporosis symptoms and signs?
    • What are the consequences of osteoporosis?
    • Why is osteoporosis an important public health issue?
    • What factors determine bone strength?
    • What tests do health care professionals use in the diagnosis of osteoporosis?
    • What types of health care professionals treat osteoporosis?
    • Who should have bone density testing?
    • What is the treatment for osteoporosis, and can osteoporosis be prevented?
    • Exercise, quitting cigarettes, and curtailing alcohol
    • Calcium supplements for osteoporosis
    • Vitamin D for osteoporosis
    • Can adding certain foods to one's diet help to prevent osteoporosis?
    • Are there foods to avoid when it comes to osteoporosis?
    • Hormone therapy (menopausal hormone therapy)
    • Medications that prevent bone loss and breakdown
    • Choosing an osteoporosis medication
    • Prevention of osteoporosis due to long-term corticosteroids
    • Monitoring osteoporosis therapy
    • Prevention of hip fractures in elderly people with osteoporosis
    • What are complications of osteoporosis?
    • What is the prognosis (outlook) for patients with osteoporosis?
  • Migraine Headache Migraine headaches are severe headaches that are sensitive to light, sounds, and smells. Some people who suffer from...learn more »
    In This Article
    Migraine Headache Article
    • Migraine headache definition and facts
    • What is a migraine headache?
    • What is migraine with aura?
    • What are migraine triggers?
    • What are the signs and symptoms?
    • What causes migraines?
    • What are the risk factors?
    • How can I tell if it's a migraine or a different type of headache?
    • What are the treatments for migraine headaches?
    • Migraine medications
    • What remedies and lifestyle changes help manage and decrease the frequency of migraines?
    • How are migraines managed during pregnancy?
    • How are migraines managed in children?
    • What is the prognosis for a person with migraines?
    • Can the frequency of headaches be prevented?
  • Restless Leg Syndrome Restless leg syndrome (RLS) is a common cause for painful legs that typically eases with motion, and becomes worse and more...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?

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