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Tag: what is migraine headache

what is migraine headache

what is migraine headache

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What Causes Migraine Headaches? Migraine headaches are a symptom of an overall condition known as migraine. Doctors don’t know the exact cause of migraine headaches, although they seem to be related to changes in the brain as well as to genes that run in families. You can even inherit the triggers that give you migraine headaches, like fatigue, bright lights, weather changes, and others. For many years, scientists believed migraines resulted from changes in blood flow in the brain. Many now think that they happen because of flaws in the brain passed down from your parents. A migraine starts when overactive nerve cells send out signals that activate the trigeminal nerve-the nerve that supplies sensation to your head and face. Activation of the nerve causes release of certain chemica