By

The Melanoma Mnemonic

Keep an eye out for moles with these traits.

Asymmetry
One half doesn’t match the other half.

Border
The edges are ragged, blotched or blurred.

Color
The pigmentation is not uniform.

Diameter
The width is greater than 6 millimeters (the width of a pencil eraser).

Elevation/Evolution
The mole has different elevations/contours or has changed.