Hi, I have recently noticed a long indentation in the top of my right thigh, it isn t painful, but I m curious to know what would cause this. I have recently started practising basic yoga asana s, I don t think I m doing anything strenuous enough to tear a muscle and would expect to feel pain if this was the case. I m only 32, not over weight and in reasonably good health. I would really appreciate an expert opinion, before bothering my busy doctor. Much appreciated.