Watch for changes in the size or color, or the appearance of sudden ulceration, bleeding , or itching in the birthmark. It usually appears over the lower back or buttocks, sometimes in other areas including the trunk or arms. These are more commonly seen in darker-skinned populations and may persist for months or years but do not become cancer or develop other symptoms. There is no known way to prevent birthmarks. Biopsy or analysis of removed nevi may show cancerous changes.
Treatment varies depending on the type of birthmark and associated conditions.
Usually no treatment is required for the birthmark itself. Large or prominent nevi that affect the appearance and self-esteem may be covered with special cosmetics. Nevi may be removed surgically if they affect the appearance or if they have an increased cancer risk. Congenital nevi have an increased cancer risk and should be examined. Call for an appointment with your health care provider if any change occurs in color, size, or texture of a nevus or other skin lesion .