Can you imagine a headache that lasts for days, months or even years? Millions of migraine sufferers can. It's a condition that affects many people -- so why are migraines still greatly underdiagnosed?
More than 45 million Americans suffer from recurrent headaches. Learn more about causes, symptoms and treatments of headaches, plus get facts, common causes, and treatment for headaches. See more »
Learn more about what ails you. Here are some common symptoms.See all »