Definitions for "Migraines"
are the worst type of headaches. This headache can usually be preceded by a sick feeling or a blurring of vision or flashing lights in front of the eyes. A migraine will usually begin with a fierce, throbbing pain on one side of the head. This pain may spread and is often accompanied by nausea and vomiting. A migraine can last for hours or days. Migraines are caused by the dilation and contraction of the blood vessels on one side of the brain.
A neurologic syndrome with a secondary vascular component. Migraines are due to a disorder (probably genetic) of neurologic processing of sensory information from the head or neck. The headache is often one-sided and if accompanied by jagged lights, "heat waves" or circles of light, it is called "Migraine with Aura" or "Classic Migraine". Vision changes alone without the headache are called "Ophthalmic Migraines".
Acute headaches often accompanied by heightened sensitivity to light and sound, nausea, vomiting or dizziness.
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See Migraine.