Migraine is a neurological synrome that can cause headache. It is a common condition that affects women more than men. The typical migraine headache is one-sided and pulsating, lasting four to 72 hours. Accompanying complaints are nausea and vomiting, and a heightened sensitivity to bright lights (photophobia) and noise (hyperacusis). Approximately one third of people who experience migraine get a preceding aura, in which a patient senses a strange light or unpleasant smell. Patients often describe triggers they feel precipitate an episode of migraine, such as certain foods and beverages (like chocolate or alcohol), stress or menstruation. In some migraine types there are typical features but the headache remains absent, and in children abdominal pain may be a prominent feature.