My baby ALWAYS sleeps on the left side of his head, despite all the "tricks" I was told to get him to stop. He had a flat spot on his head, at his 6 month check up, about 2 weeks ago, the doc wasn't the least bit concerned, he didn't even check his head. He said since he's sitting up now and will be mobile soon, it would work itself out. I just don't see how 12+ hours on that one side sleeping will work itself out even with being mobile & sitting up. I try turning his head once he's out but he just whips it back, or he wakes up & starts crying - so sometimes it's not even worth trying to move him. He doesn't have torticolitis bc he moved his head and neck in all directions throughout the day and even in naps he'll let me move his head, just NOT at night. I know it's all cosmetic but I don't want my baby waking around with a lopsided head if I can do something about it.