My friend hit his head on a car and it left a cut and a bump. He did it on a Monday night now its Wednesday and he thinks he might have a concussion but doesn't have any extra money or insurance to go to a doctor. But he threw up Tuesday and says he has some headaches. I told him to get lots of rest and to not be taking anything but Tylenol cause i know that ibuprofen Advil and Bayer can thin out the blood. but is there anything else he should be doing?