Targetguy I am understanding that you have taken him to the Dr. for this issue, if so I might consider taking him to another for a second opinion. Children don't normally bang their head on the wall for no good reason. Unless they are autistic or are very angry. You would be the only one to really know if he is just acting out or if something is wrong. I feel if he was just acting out you prob wouldn't be asking for advice. If you are concerned I would make an appointment with a Dr. You have that right. You are his dad.