My son is 18 mo, and just started hitting his forehead on stuff intentionally. It's basically when he's angry or upset at me or his dad. He will go to a wall or the coffee table and purposely hit his forehead on it. At first he would do it lightly, so i thought it was just his way of trying to get attention, so we ignored it. it has gotten worse, to where he hits his head so hard, like tonight, he knocked a photo off the wall he hit his head on, it was that hard. I am getting really concerned. I don't want him to continue this, because it may actually cause damage to his brain at some point, but i don't know how to discourage him from it. do i give him a time out in his bed/crib and tell him no every time he does it? Please help!!!