I am a head banger when I am very stressed. I also punch myself in the head as well as hitting it against a wall. I have never become unconscious from it. Though I have made marks and bumps from that. Its rare that I do it. I mainly cut. Its only when my symptoms become severe that I do this. Also this might be triggering to some people but in the past I have also used a hammer against my head. Never hard enough to cause serious brain damage. But when I am low enough or psychotic enough to actually go through with these actions, I end up in the hospital.