Seborrheic keratosis, also known as age spots, is a common benign skin tumor, and ageing skin degeneration; nevus pigmentosus can occur at any age, is also a benign skin lesion, mainly related to congenital genetic factors.
Seborrheic keratosis occurs more often in the age of 40 years old or above, the incidence rate is higher and higher with the increase of age, generally more slightly protruding, the surface of the skin increases gradually with the increase of age, the surface is different degrees of keratinization, and the number, shape, size of the performance of a variety of, seems to stick to the surface of the skin.
Nevus pigmentosus can occur in any part of the body, can occur in all ages of life, most do not protrude from the skin surface, benign manifestations, and do not require special treatment.
Seborrheic keratosis or nevus treatment can be done by laser surgery.