A seborrhoeic keratosis is a harmless warty spot that appears during adult life as a common sign of skin aging. Some people have hundreds of them. Seborrhoeic keratosis (or seborrheic keratosis, using American spelling is also called SK, basal cell papilloma, senile wart, brown wart or barnacle.
There is some evidence that skin exposed to the sun is more likely to develop a seborrheic keratosis.growths also appear on skin that is usually covered up when people go outdoors approximately 29% and 36% exposed areas were more often flat and more than 3 mm in diameter than those on the non-exposed areas.
A seborrheic keratosis isn’t dangerous, but you shouldn’t ignore growths on your skin. It can be difficult to distinguish between harmless and dangerous growths. Something that looks like seborrheic keratosis could actually be melanoma.