Seborrheic keratoses are the most common benign tumor in older individuals. Seborrheic keratoses have a variety of clinical appearances, as seen in the images below, and they develop from the proliferation of epidermal cells. No specific etiologic factors have been identified.
These are not contagious and do not spread. They have no relationship to skin cancer and do not pose a risk to health. They get darker after sunless tanning creams have been used. Unlike moles Nevi, they never turn into melanoma stastistics estimated to be between 15% and 36% Seborrheic keratoseson exposed areas were more often flat and more than 3 mm in diameter than those on the non-exposed areas.
Another treatment often done is scraping off with a curette. This is more useful when only a few need to be done, and one really wants them not to come back. It is also used when one spot needs a biopsy, since the scrapings can be sent to a lab. Healing is slower and scarring is more common. Sometimes seborrheic keratoses are burnt off with an electric needle or laser, especially if they are small.