Moles are caused when cells in the skin (melanocytes) grow in clusters or clumps. Melanocytes are distributed throughout your skin and produce melanin, the natural pigment that gives your skin its color.

Do moles go away?

They can change and evolve over time. Some moles eventually fall off altogether. When healthy moles disappear, the process is typically gradual. A disappearing mole may begin as a flat spot, gradually become raised, then get light, pale, and eventually disappear.

Can moles suddenly appear?

Moles, or nevi, typically form during childhood and adolescence, but new moles can appear in adulthood. Although most moles are noncancerous, or benign, the development of a new mole or sudden changes to existing moles in an adult can be a sign of melanoma.