Accessibility View NARRA DERMATOLOGY AND AESTHETICS MENU Welcome! > Articles > Skin Growths > Moles (Nevi) Moles (Nevi) Created in Skin Growths Moles are brown or black growths, usually round or oval, that can appear anywhere on the skin. They can be rough or smooth, flat or raised, single or in multiples. They occur when cells that are responsible for skin pigmentation, known as melanocytes, grow in clusters instead of being spread out across the skin. Generally, moles are less than one-quarter inch in size. Most moles appear by the age of 20, although some moles may appear later in life. Most adults have between 10 and 40 moles. Because they last about 50 years, moles may disappear by themselves over time. Most moles are harmless, but a change in size, shape, color or texture could be indicative of a cancerous growth. Moles that have a higher-than-average chance of becoming cancerous include: Congenital Nevi Moles present at birth. The larger their size, the greater the risk for developing into a skin cancer. Atypical Dysplastic Nevi Irregularly shaped moles that are larger than average. They often appear to have dark brown centers with light, uneven borders. Higher frequency of moles People with 50 or more moles are at a greater risk for developing a skin cancer. In some cases, abnormal moles may become painful, itchy, scaly or bleed. It's important to keep an eye on your moles so that you can catch any changes early. We recommend doing a visual check of your body monthly, including all areas that don't have sun exposure (such as the scalp, armpits or bottoms of feet). Use the American Academy of Dermatology's ABCDEs as a guide for assessing whether or not a mole may be becoming cancerous: Asymmetry: Half the mole does not match the other half in size, shape or color. Border: The edges of moles are irregular, scalloped, or poorly defined. Color: The mole is not the same color throughout. Diameter: The mole is usually greater than 6 millimeters when diagnosed, but may also be smaller. Evolving: A mole or skin lesion that is different from the rest, or changes in size, shape, or color. If any of these conditions occur, please make an appointment to see one of our dermatologists right away. The doctor may do a biopsy of the mole to determine if it is or isn't cancerous and/or may surgically remove it. CATEGORIES What is a Dermatologist? Anatomy of the Skin Skin Care Topics Skin Conditions Skin Growths Skin Infections Contact Us We Look Forward To Hearing From You. 710 NW Juniper Street Suite 204, Issaquah, WA, 98027, US × + − Leaflet | Map data provided by Internet Brands Monday: 9:00AM-4:30PM (hours may vary) Tuesday: 9:00AM-5PM (hours may vary) Wednesday: Closed Thursday: 9:00AM-5:00PM (hours may vary) Friday: 9:00AM-4:30PM (hours may vary) Saturday: Closed Sunday: Closed 710 NW Juniper Street Suite 204 Issaquah, WA 98027 (425) 677-8867 Home Staff Cosmetic Services Medical Services New Patients Contact Us COVID-19 Clinic Updates COPYRIGHT © 2021 MH SUB I, LLC DBA OFFICITE. ADMIN LOG IN SITE MAP