What is migraine headache?

Your head is aching terribly and you think you had migraine headache, right? Now I will show you what is a migraine headache.

Migraine afflicts 28 million Americans, with females suffering more frequently (17%) than males (6%). Migraine headache is a form of vascular headache, it is cause by vasodilatation, and what is the reason of vasodilatation? That cause the release of chemicals from nerve fibers that coil the large arteries of the brain. Enlargement of these blood vessels stretches the nerves that coil around them and causes the nerves to release chemicals. The chemicals cause inflammation, pain, and further enlargement of the artery. The increasing enlargement of the arteries magnifies the pain.

Migraine attacks commonly activate the sympathetic nervous system in the body. The sympathetic nervous system is often thought of as the part of the nervous system that controls primitive responses to stress and pain, the so-called "fight or flight" response, and this activation causes many of the symptoms associated with migraine attacks; for example, the increased sympathetic nervous activity in the intestine causes nausea, vomiting, and diarrhea (Quote: medicinenet.com)