Moles can change over time. It’s important to know what changes could be a sign of skin cancer.
Here’s what you should look for.
Asymmetry — If an imaginary line is drawn though the mole, the halves do not match.
Border — Irregular, uneven borders.
Color — Moles that have several colors or become lighter or darker.
Diameter — Moles larger than the size of a pencil eraser.
Evolving — Moles that itch or bleed, shrink or grow, change color, or have portions that are elevated; or a new growth on the skin.
Some source material from: Centers for Disease Control and Prevention, Skin Cancer (CDC.gov/Cancer/Skin)