Headache - migraine
Key points
- Migraine headaches are a type of headache that some people get repeatedly over time.
- A lot of people get migraines - about 6 out of 100.
- Warning signs that a migraine is coming include seeing stars or zigzag lines, having tunnel vision, or temporary blind spot.
- Migraine headache may be diagnosed by your doctor based on your symptoms, history of migraines in the family, and your response to treatment.
Alternative names
Migraine
Definition
Migraine headaches are a type of headache that some people get repeatedly over time. Migraines are different from other headaches because they occur with symptoms such as nausea, vomiting, or sensitivity to light.
Some people who get migraines have warning symptoms, called an aura, before the actual headache begins. Most people, however, do not have such warning symptoms.
See also:
- Common migraine (which have no warning symptoms or aura)
- Classic migraine (which have an aura consisting of visual disturbances before the headache starts)
- Mixed tension migraine (has features of both migraines and tension headache)
Causes, incidence, and risk factors
A lot of people get migraines - about 6 out of 100. The headaches tend to start between the ages of 10 and 46, may run in families, and occur in women more often than men.
Migraines are classified as either "common" or "classic". Common migraines do not have any warning symptoms, while classic migraines do have a warning (the aura). Most migraine patients have the common type.
The exact cause of migraine is not known. Migraine headaches are related to problems with blood flow through parts of the brain. At the start of a migraine, blood vessels in certain areas of the brain constrict (narrow), leading to symptoms like visual disturbances, difficulty speaking, weakness, or numbness. Minutes to hours later, the blood vessels dilate (enlarge), leading to increased blood flow in the brain and a bad headache.
Why these changes in blood vessels and blood flow occur in the brain is not understood. Certain triggers, however, make it more likely for you to get migraines:
- Allergic reactions
- Bright lights, loud noises, and certain odors or perfumes
- Physical or emotional stress
- Changes in sleep patterns
- Smoking or exposure to smoke
- Skipping meals
- Alcohol or caffeine
- Menstrual cycle fluctuations, birth control pills
- Tension headaches
- Foods containing tyramine (red wine, aged cheese, smoked fish, chicken livers, figs, and some beans), monosodium glutamate (MSG), or nitrates (like bacon, hot dogs, and salami)
- Other foods such as chocolate, nuts, peanut butter, avocado, banana, citrus, onions, dairy products, and fermented or pickled foods
Written and revised by
Gerald Hurowitz, M.D.
Our doctors write and review articles for accuracy and keep them up to date.
health.am provides general information, not medical advice. Always consult a qualified health professional about your own health.