A migraine is a severe headache often accompanied by nausea, vomiting, and sensitivity to light and sound. It typically presents as a throbbing pain on one side of the head and can last from hours to days. Migraines may be preceded by an aura, which includes visual disturbances or tingling sensations. Triggers include stress, hormonal changes, certain foods and drinks, and lack of sleep. Treatment involves over-the-counter or prescription medications to relieve pain and prevent attacks, as well as lifestyle changes to avoid triggers. Migraines can significantly impact daily activities and require careful management.