The exact cause of migraine headaches is unknown; it is thought to be due to abnormal brain activity causing a temporary alteration in the nerve signals, chemicals and blood flow in the brain.
Lady holding head in pain
Migraine headaches can be very debilitating.
Migraine headaches can be very debilitating affecting 1 in 4 households in America. They are more common in women than men, and 3% of people have chronic migraines where they experience symptoms for half the month for six months