I have these strange lines on the inner side of my right heel. They look like either stretch marks or wrinkles, but like old people wrinkles and not the regular wrinkles you see on a foot (I'm only 25, so not even that old) They sometimes get very itchy, and dry as well. Has anyone else had anything like this? Is it even possible to get stretch marks on your heel/foot? What are these lines and what can I do to get rid of them?