Migraines are debilitating; they’re not just little headaches. But people often misunderstand this and assume that a migraine isn’t a big deal. That couldn’t be further from the truth. About 12 percent of the American population experiences migraines (18 percent of women and 6 percent of men), according to the Migraine Research Foundation. And more than 90 percent of sufferers aren’t able to function normally when they have an attack. A “migraine is subject to the same prejudices that all pain patients experience. It is hard for people to understand why you are unable to fulfill your regular activities of daily living when they can’t see anything physically wrong with you,” said Meredith Barad, a clinical associate professor of anesthesia and neurology at Stanford Hospital and Clinics.