noun\ˈmī-ˌgrān, British oftenˈmē-\(Medical Dictionary)
Medical Definition of MIGRAINE
: a condition that is marked by recurrent usually unilateral severe headache often accompanied by nausea and vomiting and followed by sleep, that tends to occur in more than one member of a family, and that is of uncertain origin though attacks appear to be precipitated by dilatation of intracranial blood vessels
: an episode or attack of migraine <suffers from migraines>—called also sick headache
Recurrent vascular headache, usually on one side of the head. Severe throbbing pain is sometimes accompanied by nausea and vomiting. Some migraine patients have warning symptoms (an aura) before the headache, including visual disturbance, weakness, numbness, or dizziness. If a stimulus (e.g., a particular food or drink) is found to trigger attacks, avoidance can prevent them. Drugs may be taken as an attack begins (to abort it) or daily by patients with very frequent attacks (to prevent them or reduce their severity).