Can. Not cancer, but sarcoma. It is a malignant tumor of connective tissue.
Heat erythema
It all starts with warm erythema. These are such mesh spots on the skin that appear from some kind of heat source. Previously, this happened among people who warmed themselves by the fire. Then people moved to houses with central heating, and thermal erythema began to appear in those who sculpted themselves at work. with infrared radiation or a heating pad he warmed a chronically painful back, or even young people who kept a hot laptop on knees. Well, there are all sorts of steelworkers, cooks and other blacksmiths.
In general, this kind of thing is more common among women.
So they did not fully understand the mechanism of this erythema. It is generally accepted that if you scald the skin with such a temperature that does not yet cause a burn, but is already hot, then through for several weeks, months or years, the blood vessels will be damaged, begin to leak, and sweat through their wall blood. Brown spots will turn out.
We need a temperature somewhere between 43-47 degrees.
Pigmentation may remain from erythema heat. Nothing usually hurts or even itches.
Sarcoma
And all would be fine, but sometimes (rarely), against the background of such erythema, ulcers, areas of keratinization or vesicles appear. This is how sarcoma can manifest itself. It is a malignant tumor.
Therefore, having heated your erythema as in the picture above, you need to stop and no longer warm up. Otherwise, you can warm up the sarcoma. Well, if bubbles, ulcers or areas of keratinization appear against the background of thermal erythema, then you need to run to a dermatologist and demand an accurate diagnosis from him. Maybe even a biopsy.
Didn't you have such a thing from car seat heating?
