When a Mole Should Be Checked by a Doctor

Moles are common skin growths that most people have, often appearing as small brown, black, or flesh-colored spots. While the majority of moles are harmless, some can indicate early signs of skin cancer, including melanoma. Knowing when to get a mole checked by a doctor can make all the difference in early detection and successful treatment.

Normal vs. Concerning Moles

Most moles are stable, round, and uniform in color. They usually appear in childhood or early adulthood and don’t change much over time. However, certain changes can be red flags.

The ABCDE Rule for Moles

Dermatologists recommend watching for these warning signs:

• A – Asymmetry: One half of the mole doesn’t match the other.

• B – Border: The edges are irregular, blurred, or jagged.

• C – Color: More than one shade (brown, black, red, white, or blue) is present.

• D – Diameter: Larger than 6 mm (about the size of a pencil eraser).

• E – Evolving: Any change in size, shape, or color, or the development of new symptoms such as itching, bleeding, or crusting.

Other Situations to See a Doctor

• A new mole appears after the age of 30.

• The mole becomes painful, itchy, or starts bleeding.

• A mole looks significantly different from your other moles (“the ugly duckling sign”).

• There’s a strong family history of skin cancer.

Why Early Check-Ups Matter

Skin cancers like melanoma can spread quickly if untreated. Regular skin self-examinations and professional checks by a dermatologist help detect dangerous changes at an early, treatable stage.

The Bottom Line

Not every mole is dangerous, but staying alert to changes is essential. If a mole looks suspicious, don’t wait—get it evaluated by a dermatologist. Early detection saves lives, and a quick check may give you peace of mind.

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