What does a normal mole look like?
Last updated September 3, 2026.
A normal mole is small (under pencil-eraser size), round or oval, one even color, smooth-bordered, and stable for years. Most adults have 10 to 40 of them. Change is what earns a check, per the ABCDE rule: Asymmetry, ragged Border, multiple Colors, Diameter growing, or any Evolution, including new itching, bleeding, or crusting. The practical shortcut is the ugly-duckling rule: your moles resemble each other, so the one that looks different from the rest is the one to show a doctor. Moles appear anywhere, including sun-hidden skin, soles, and under nails. Habits that matter: a monthly self-check with a mirror or a partner for your back, annual skin checks for the fair, freckled, many-moled, or family-history crowd, and sun protection as the only prevention lever. A mole that changes, bleeds unprovoked, or is new and growing after 40 gets a dermatology visit within weeks: melanoma caught early is highly curable, which is exactly why the monthly look is worth doing.
What to do
- Normal: small, even color, smooth border, stable.
- ABCDE: asymmetry, border, color, diameter, evolving.
- Ugly duckling: the mole unlike your others gets shown.
- Monthly self-check, yearly professional if higher-risk.
- Changing, bleeding, or new after 40: dermatology within weeks.
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