Is it possible to create head deformities from resting your baby's head on your arm (while breastfeeding, while he's sleeping, and so on.). I'm careful not to put him down too much. I wear him in a sling most of the day or at least hold him, but when he falls asleep inthe sling, he likes being cradled. His head looks a little odd in the back, but perhaps this I just a variation of normal . I didn't even notice until the other day during a bath I took with him and I got his head all wet to wash. (he's got LOTS of hair which he was born with). He's 11 weeks today. His head is a little long and high in the back. Hard to describe. I plan to take pictures of his wet head for my next Dr. Appt. At 4 months old.