Last night, I got a frantic phone call from a new mom: "the baby's head is lopsided!" I hadn't noticed anything at the 2-week visit. The child had developed normally, and examination of the head had been normal … so I didn't think it was an emergency … but she was quite concerned, so I told her I'd meet her in the office. On examination, I found that the child had positional plagiocephaly. This is a problem that's increasing in frequency due to back sleeping .. but this child's head wasn't flat. Rather, it was asymmetric. Turns out, grandma holds the baby in her left arm all day .. watching TV.