What causes migran headaches?

Migraines: We know that migraines are spasms in blood vessels which results in terrible headaches and sometimes visual auras, butu nfortunately we do not know exactly what causes migraines. Sometimes migraines can have triggers, which are different for each person. More common triggers are caffeine, cigarettes, and chocholate.

One more trigger: Hormonal changes in your cycle can also trigger migraines in women.