Migraine headaches are described as being of a recurrent nature. They are characterized by certain symptoms that precede the actual onset of the headache. These are called prodromal symptoms and may include one or several typical symptoms in each patient. The prodromal symptoms include spots before the eyes, visual field defects, flashes of light, unusual sounds, irritability, depression, restlessness, and anorexia, to name a few. The symptoms may disappear when the headache begins or may merge with it. The symptoms usually follow the same pattern time after time for each patient, and become good indicators that a headache is on the way. Most of the time the headaches will be on the same side, but this is not an absolute rule. The patient may have attacks on a daily basis or they may occur once every few months.
Without treatment, the attacks may last for hours or days. It is not uncommon for the patient to experience nausea and vomiting and an aversion to light. Many people who suffer from migraines will tell you the only way to stop them is to remain in a dark room with a wet wash cloth over their eyes.
The cause of migraine headaches is unknown. ...
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