A migraine headache is a form of vascular headache. Migraine headache is caused by enlargement of blood vessels that causes the release of chemicals from nerve fibers that coil around 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.or in simple word you can say Migraines are due to changes in the brain and surrounding blood vessels.
Most people who suffer from migraines get headaches that can be quite severe. A migraine headache is usually an intense, throbbing pain on one, or sometimes, both sides of the head. Most people with migraine headache feel the pain in the temples or behind one eye or ear, although any part of the head can be involved. Besides pain, migraine also can cause nausea and vomiting and sensitivity to light and sound. Some people also may see spots or flashing lights or have a temporary loss of vision.
Migraine can occur any time of the day, though it often starts in the morning. The pain can last a few hours or up to one or two days. Some people get migraines once or twice a week. Others, only once or twice a year. Most of the time, migraines are not a threat to your overall health. But migraine attacks can interfere with your day-to-day life.
