How do I know if a mole is cancerous?

You can identify potential skin cancer by using the ABCDE rule to evaluate your moles: Asymmetry (lopsided shape), Border (irregular or blurry edges), Color (multiple shades), Diameter (larger than 6mm), and Evolving (any change in size, shape, or symptom). If a mole meets any of these criteria, it requires a professional exam by a board-certified dermatologist.

What is the ABCDE rule for skin cancer?

The ABCDE rule is a clinical guide used by dermatologists and patients to identify the early warning signs of melanoma. Early detection is critical; when caught early, most skin cancers are highly treatable.

• A is for Asymmetry: One half of the mole does not match the other half.
• B is for Border: The edges are ragged, blurred, or irregular instead of smooth.
• C is for Color: The mole has multiple shades of tan, brown, black, or even patches of red, white, or blue.
• D is for Diameter: The spot is larger than 6mm (about the size of a pencil eraser).
• E is for Evolving: The mole is changing in size, shape, or color, or it has started to itch, crust, or bleed.

What does a “normal” mole look like?

Most people have moles, and the majority are harmless. A normal, benign mole is typically:

A uniform color (usually tan or brown).

Round or oval-shaped with distinct, smooth borders.

Stable, meaning it does not change over time.

How do I perform a skin self-exam?

Performing a monthly self-exam helps you become familiar with your skin so you can notice changes quickly.

Check your face and scalp: Use a mirror to check your ears and the back of your neck.

Examine your torso: Check your chest, stomach, and underarms.

Check your “hidden” areas: Don’t forget your palms, the soles of your feet, and between your toes.

Use a buddy: Have a partner check your back and the backs of your thighs.

When should I see a dermatologist for a mole?

While the ABCDE rule is a helpful home tool, it does not replace a professional diagnosis. You should schedule a skin check at Skin Solutions Dermatology if:

A mole fits any of the ABCDE criteria.

You have an “Ugly Duckling” spot—a mole that looks significantly different from all your others.

A spot is new or growing rapidly.

Professional Skin Cancer Screening in Middle Tennessee

At our clinics, our providers specialize in the early detection and treatment of skin cancer. An annual professional skin check is the best way to ensure your skin remains healthy and resilient.

Don’t wait for a change to become a problem!