These flat, brown spots appear on the parts of your body that get the most sun, including your arms, legs, the backs of the hands, shoulders, chest, and face. And once you have them, they get bigger, darker and more numerous with more sun exposure.

Can sunspots grow?

Sunspots are harmless, but any spot that grows quickly, changes in appearance, or seems unusual should be evaluated by a doctor.

What do cancerous sun spots look like?

The edges are irregular, ragged, notched, or blurred. The color is not the same all over and may include shades of brown or black, sometimes with patches of pink, red, white, or blue. The spot is larger than ¼ inch across – about the size of a pencil eraser – although melanomas can sometimes be smaller than this.