I am an identical twin and my sister and I both have the same strange problem. For years, every time we laugh too hard or smile too much these indents form in the backs of our heads. The more we laugh, the deeper they get. One indent occurs on each side on the lowest part of the skull about two inches from the center line of the back of the head. Does this happen to anyone else? Nothing drastic has occurred, but the pain occurred a few hours ago and it was bad enough to get me curious again.
I have never consulted a doctor for this specific issue.
I have never consulted a doctor for this specific issue.