A seborrheic keratosis is a type of skin growth that can be found anywhere on the body, but typically is not observed on the soles of the feet or palms of the hands. These lesions often begin as small, rough areas of skin, but can progress to thick, wart-like lesions. They are most commonly brown, but may also be white, yellow or black. Increasing age, family history and sun exposure are all risk factors for the development of seborrheic keratosis. It is advised to have a physician assess the lesion prior to removal.