To prevent your baby from getting a flat head, the key is to move your baby in different positions. Because doctors have instituted the back to sleep campaign for SIDS, where babies are put back to sleep on the back of their head. Unfortunately some babies develop a flat head because of that. It's nothing serious and they are given a little cranial device that they wear that helps remold the head and everything goes back to normal. But to prevent this you can do a couple easy things.