Headaches are among the most common symptoms following a concussion or traumatic brain injury. Although many improve within days or weeks, others persist for months or even years, sometimes becoming one of the most disabling consequences of the injury. These are known as post-traumatic headaches.  The International Headache Society[1] recognizes post-traumatic headaches as a distinct category of headache disorder. Unlike migraines or tension headaches that arise independently, a post-traumatic headache is classified as a secondary headache. It develops as a consequence of a brain injury. It may resemble a migraine or tension headache, but its relationship to the trauma is what