Migraine is the most common primary headache disorder, involving abnormal brain activity, nerve signals, and blood vessels. More than just a headache, migraine can significantly impact daily life and is diagnosed after at least five attacks that fit specific criteria. Symptoms during an attack may include head pain, visual disturbances, sensitivity to light or sound, nausea, and fatigue.
Attacks usually last 4 to 72 hours, with varying severity and symptom combinations, and most people feel well between episodes. The severity and combination of symptoms can vary, and although stages of a migraine attack are recognised, they may not always be clearly distinguishable for everyone.