My son is 6 months old and his head is flat in the back. It's only the top half, the bottom is coming out. His pediatrician said he doesn't need a helmet he acts normal and she said it's just a cosmetic thing. She said it's up to me and my husband if we want to get him one. I don't know what to do. I hate for him to get one but i slnt want his head to be flat. Any feedback would be greatly appreciated.