C.
Hi L.,
My youngest son does this also. He started somewhere around a year I don't remember exactly. He will bang his head on the floor or the wall when his is upset/angry/frustrated. He also often had a bruise in the middle of his forehead from doing so. He will still do it to this day occasionally but no where near what he did when he was younger. He is 2 now and more recently he will just fall to his knees and covers his face on the floor and cry or just sulk so I guess that's an improvment. He is a very all or nothing emotional child. He talks now too so being able to say what's wrong may be the reason for the improvments. I asked my pediatrician at the time when it started and she basically told me to ignore it as much as possible and as long as he is not in serious danger just let it go, stopping him could make him more frustrated that he can't express himself. That's mostly what I did/do. Now that he's a little older I try to talk to him afterward and see if I can help him with whatever caused it - usually his big brother, but sometimes it's because he can't make a toy do something he wants it too etc. I hope this makes you feel better.