I had some nevi removed by burning them. You told me before that use this technique too. If skin cancer developed in a sacr, it might be harder to tell than otherwise. Perhaps more commonly, if noncancerous mole tissue grows back, the pathologist might have trouble distinguishing the regrowth from cancer. However, neither eventuality, though theoretically possible, is very likely if the doctor who treated them to begin with was confident that the spots were benign.
Scars are white, but if the mole regrows, there can be pigment in it.
In general, white scars don't tan. They don't burn that much either. Dr. Rockoff Information contained within this forum is intended solely for general educational purposes and is not intended nor implied to be a substitute for professional medical advice relative to your specific medical condition or question. Only your physician can provide specific diagnoses and therapies. All rights reserved.