B.
I think when there is extreme behavior like this it warrants an evaluation by early intervention specialists. The wording "may be normal up the 4" is ridiculous. Head banging is a sign of extreme frustration or pain. If you are in Nevada, call Nevada Early Intervention Services (NEIS). It's free and if he's OK great! If he has a diagnosis such as developmental delay, PDD, or autism then the earlier the diagnosis the better. Intense early intervention is vital for kids with any developmental disability. You are obviously concerned or you wouldn't have asked for advice. ALways listen to your Mom intuition, it will never fail you. Never, ever take the advice of "let's take a wait and see approach" that so many physicians are giving. If you are concerned, keep taking him to experts until someone listens and evaluates him. My daugher was diagnosed with autism at age 3 1/2. I knew something was wrong but I didn't know what. After being misdiagnosed several times she finally got the intervention she needed. But we lost a good year and a half. What I wouldn't give to have that time back. She is now almost indistinguishable from her peers. We are hoping for a complete loss of the autism diagnosis. It is possible for some children with autism to "recover" (loss of the diagnosis completely). But it takes a lot of work and the sooner the better. I'm not saying he has autism but it's worth getting him evaluated. Good luck and I sincerely hope it's nothing.