Hi M., My youngest child had the same thing. His Pediatrician even had me take him to a therapist who taught me how to lay him down, hold him, etc., as if I didn't know, as I have had three others before him, but did not have this problem. Well, this didn't last very long, as my Friends told me that that was a common thing and he did not need therapy. I tried the wedge pillow, stuffing blankets snuggly and the whole bit, but he still had the flat spot (you could tell he loved sleeping on that side), on the left side of the back of his head. Nicholas finally started moving around, so he wasn't just sleeping in the same position. Now at 18 1/2 months, the flat spot is gone and you would never tell my looking at him, that he even had one in the first place. Don't get yourself stressed like I did, it will go away when he becomes a toddler. Take Care M.... :)