Hi I'm a little embarrassed, but I have a small indentation on my lower back just above my right butcheek. It is small and I just noticed it tonight but I'm a little worried it about a n inch wide and a couple centimeters deep. Do you have any idea what it is? It doesn't hurt, and I don't have one on the other side I really don't want to have to see a doctor about It and I was just wondering. Thanks