t make a habit of it. In a
concussion, there is always brain
swelling. There a window of opportunity to reduce the
swelling. Action is ideally taken within the first four hours. After 24 hours, there isn't much to do after several days. All the damage than can be done has been done. The swelling has the potential to compress blood vessels, causing ischemia and death of brain cells. The bad-news bears. In the future, if you ever bang your head hard, head for an emergency room.