What causes headaches? - Dan Kwartler

Download a free audiobook and support TED-Ed’s nonprofit mission: Check out Oliver Sacks’s “The Man Who Mistook His Wife for a Hat“: View full lesson: In ancient Greece, the best-known remedy for a long-standing headache was to drill a small hole in the skull to drain supposedly infected blood. Fortunately, doctors today don’t resort to power tools to cure headaches, but we still have a lot to lear