Migraine Headache (cont.)
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Migraine Headache Causes
The exact cause of migraine headaches is not clearly understood, though experts believe they are due to a combination of the expansion of blood vessels and the release of certain chemicals, which causes inflammation and pain.
The chemicals dopamine and serotonin are among those involved in migraine. These chemicals are found normally in the brain and can cause blood vessels to act abnormally if they are present in abnormal amounts or if the blood vessels are unusually sensitive to them.
Various triggers are thought to bring about migraine in certain people prone to developing migraine. Different people may have different triggers. Individual triggers can include:
Medically Reviewed by a Doctor on 3/1/2013
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