Through the years I have had unexplained deep (at times) horizontal indentations on both upper thighs. Almost as though something has fallen across them. Sometimes its deep enough to see and feel through my pants. Ive been to 4 different doctors, naturalists, massage therapists,chiropractors, accupuncturist, ultrasound(heated therapy) muscle tests, mri's- nothing shows anything and no one seems to no anything. Right now they arent very evident, and there arent any known reasons as to why they become more prevalant than at other times. Any suggestions? Ive about exhausted my resources.There is no pain associated with this. Thanks