I have recurring spots on my chin (2) that seem to come back in the same place although I ve had them burned off a couple times (at least) in a doctor s office. the spots are circular, and no larger than the head of a pencil eraser end (maybe a little smaller). on top of this, each continues to form scaling on top which appears to be regenerating skin that is dry/scaly in nature. If you remove the dry, thickened skin, which I have done a couple times, it just recurs. Now, I have noticed an additional similar patch show up on my shin. it started out looking like a blister, and scaled over with hardened skin. thoughts??