d accidentally scratch it,
and that would dry over
and around the spot. Grew faster than
basal cell,
and got bigger than my basal cell carcinoma, on the skin's surface, instead of underneath. Remember, itchy, won't heal, grows bigger at skin level (not just under skin).
In other words, if you have a "sore" that has been around for a while, it itches, it fails to heal up, and the "pearlized scab" is easily knocked off, I'd get to the doctor.