Understanding the ABCDE Rule for Moles

Between your annual skin checks, it's important to keep an eye on your own skin. The ABCDE rule is a widely used guide to help you identify spots that may warrant a visit to your doctor.

A is for Asymmetry. A healthy mole is usually symmetrical — if you drew a line through the middle, both halves would look the same. An asymmetrical spot is worth having checked.

B is for Border. Look for moles with irregular, ragged, or blurred edges. A well-defined, smooth border is generally a good sign.

C is for Colour. Most benign moles are a single shade of brown. Be alert to spots with multiple colours — shades of brown, black, red, white, or blue within the same lesion.

D is for Diameter. Melanomas are often larger than 6mm (about the size of a pencil eraser), though they can be smaller when first detected.

E is for Evolving. Any spot that is changing in size, shape, colour, or that begins to bleed, itch, or crust should be assessed promptly.

Remember, the ABCDE rule is a guide, not a diagnosis. If you notice any of these signs, or if something simply doesn't look right to you, book an appointment with our clinic for a professional assessment.