Headache medicine specialists are uniquely qualified to provide this care. This is because of many factors. One of the factors is that headache is the most prevalent symptom in concussion, tending to appear rather early after injury, persisting as most other symptoms of concussion dissipate. At iNHS, this fact is recognized as a clue to the mechanism of injury that underlies most concussions as opposed to the mechanisms that lead to the more moderate or severe brain injuries.