My Lo started banging the back of his head off objects, walls mainly, slowly over the last few weeks he does it when hes near anything, door, the fridge, desks, boxes, cabinets, crib, he'll crawl over to it, sit up so his back is against it and start banging his head quite hard. At first i figured he just figured out how to do it and liked the noise or something...but he keeps doing it and im worried that maybe its linked to something? hes 10.5months old. I know autism doesnt show up till about 12 months, but could this be an early sign? maybe im just over tired, over stressed and over emotional today, and im worrying about nothing. but at the same time it could be something.