My DS is 3 months old tomorrow but for the last few weeks he has made a habit of swiping his little arm up the side of his head and using his nails to scratch along the top of his scalp as he comes back down towards his face. 90% of the time he does this while being breastfed. If he is not doing this he is scratching at my breast. Now while I understand I can just put mittens on him as it's winter and it's cold the other problem is that he has worn a big bald spot along the side of his head where his arm keeps rubbing while he does this. I have tried holding his arm down but it feels cruel like I'm restraining him. Just curious if anyone else's children do this and what did you do about it? Or did they simply grow out of it?