A Guide to Moles: Understanding Types and Risks

What Are Moles (Nevi)?

Moles, also called nevi, are common skin growths formed by clusters of pigment-producing cells (melanocytes). Most people develop 10 to 40 moles over a lifetime. At Dermatology Group of Arkansas, they evaluate moles in Little Rock patients of all ages to distinguish common, harmless lesions from those that warrant closer follow-up. While many moles stay stable for years, a small number can change over time—so knowing what is typical for your skin is essential.

Common Types: Benign Nevi, Congenital Nevi, Atypical Moles

• Benign nevi (non-cancerous moles): Usually uniform in color (tan to brown), round or oval, and symmetrical. They often appear in childhood or the teen years and then remain unchanged.

• Congenital nevi: Moles present at birth. Most are benign, but larger congenital nevi carry a higher lifetime risk of melanoma and should be monitored regularly by a dermatologist.

 • Atypical moles (dysplastic nevi): These may be larger than a pencil eraser, have mixed colors, or irregular borders. Most are not cancer, but they indicate increased melanoma risk and need periodic skin checks.

When is a Mole A Concern? The ABCDEs and the Ugly Duckling Sign

The ABCDE Rule Explained

Dermatologists use the ABCDE rule to flag moles that need in-person evaluation: 

• A—Asymmetry: One half does not match the other. 

• B—Border: Edges are irregular, notched, or blurred. 

• C—Color: Multiple colors (tan, brown, black, red, white, or blue) or a very dark shade. 

• D—Diameter: Larger than about 6 mm (the size of a pencil eraser)—though melanomas can be smaller. 

• E—Evolving: Any change in size, shape, color, surface, or symptoms (itching, bleeding, crusting).  If a mole shows one or more of these features, a professional exam is recommended.

The Ugly Duckling Rule

The “Ugly Duckling” rule is a quick way to spot outliers: If one mole looks different from a person’s other moles—or one spot is changing while the rest are stable—it deserves attention. This pattern-based approach helps people with many moles notice a single lesion that does not fit their usual look.

Skin Cancer Prevention and Self-Checks Between Visits

Practical Prevention Tips

Sun protection lowers the risk of skin cancer and helps keep benign nevi from darkening. Daily habits that help include seeking shade from 10 a.m. to 4 p.m., wearing wide-brim hats, UV-blocking sunglasses, and UPF clothing, and using a broad-spectrum, water-resistant sunscreen SPF 30 or higher—reapplying every two hours and after swimming or sweating.

Monthly head-to-toe self-exams can catch change early: use good lighting, mirrors, and a partner to view the scalp, back, and other hard-to-see areas. Photographing moles can help track subtle evolution over months. People with many atypical moles, a personal or family history of melanoma, a history of blistering sunburns, or tanning bed use benefit from regular dermatologist-guided surveillance.

Reasons People Choose Mole Removal

Cosmetic Reasons

Even when a mole is non-cancerous, people may elect removal if it frequently snags on clothing or jewelry, sits in a cosmetically sensitive area (such as the face), or causes shaving hassles and irritation. Depending on mole type, depth, and location, common approaches include tangential (shave) removal of raised lesions and surgical excision for flatter or deeper lesions. Scarring risk varies by technique and individual healing.

Medical Reasons and What to Expect

A mole may be removed to rule out melanoma or another skin cancer, or because it clearly meets concerning criteria. When cancer is suspected, complete excision with a small margin is typical so that a pathology lab can examine the entire specimen. Local anesthetic is used in-office, and results guide next steps. Most patients resume normal activity the same day, with wound care instructions to support healing. If melanoma is confirmed, treatment follows established guidelines based on depth and other features.

Living With Moles Over Time in Little Rock, Benton, Conway, Hot Springs, and Pine Bluff

Monitoring Across the Lifespan

Children often develop new benign nevi through adolescence. In adults, new or changing lesions merit attention. Pregnancy and some medications may darken existing moles; true structural changes still need evaluation. For older adults, any new “mole” could be a different growth (such as a seborrheic keratosis) or, less often, a melanoma—so professional assessment is wise. Consistent records—dates, photos, and notes about change—make follow-up visits more precise, no matter which clinic location you visit.

Learn more about moles in Little Rock at Dermatology Group of Arkansas. Call now at 501-227-8422 or book online.