hi a member of my family was involved in an accident 3 years ago and was concussed for a period of 5 hours before anyone found him he was knocked off the back of a truck and as he hit the ground a gas bottle fell off the truck and hit him. he now 3 years later has a large oval bruise appear on his back covering 1/3 of the back along the spine . he also experiences bleeds from his mouth and nose for no apparent reason and one of his pupils dilates and he says it feels like someone has put their fingers behind his eye and are trying to push it out. we need answers and most medical professionals insist there is nothing wrong.. but i know there is he also has episodes of verdigo and has falls?