The Science Behind Migraines
While there are several schools of thought on this issue, the general consensus is that migraines are neurovascular events starting in the brain and spreading to the blood vessels. They are typically the result of blood vessels in the brain constricting and then dilating too quickly. New scientific evidence has shown this constriction and subsequent dilation is triggered by a drop in serotonin levels.
Serotonin is the “feel good” neurotransmitter that affects mood, pain sensation by the brain, and sleep. When serotonin levels drop, the blood vessels in the brain constrict and then dilate rapidly. This dilation is what triggers the migraine; however, the fundamental cause of migraines remains a mystery.
Both sleep and exercise are the brain's reset button. Exercise also raises serotonin levels while causing the release of endorphins, the brain's painkillers.