DS2 has a spot on his left side. He doesn't have trouble moving his neck around in all directions, but he favors his left thumb and sleeps at night mostly on that side.

Our pedi isn't concerned at this point, but I am... but I also know helmet therapy isn't all that effective especially in mild cases.

If your LO had a flat spot did it resolve on its own? How old were they when things "evened out"?