Hmmm, interesting. Excellent question, Horsemommy.

I have indentations, like the ones you have on your thighs, only mine are located on my gluteus maximus (bum areas) and I've wondered if mine are related to neuromuscular disease that I have (that affects my ischial tuberosity).

In the past, I had asked the question online. I don't remember the insights others offered (where I posted had crashed and the posts/responses are gone).

I may have written it down someplace. I'll look over the next couple of days. If I can find notes on it, I'll let you know what people stated.