Age spots are caused by overactive pigment cells. Ultraviolet (UV) light speeds up the production of melanin, a natural pigment that gives skin its color. On skin that has had years of sun exposure, age spots appear when melanin becomes clumped or is produced in high concentrations.

Is it normal for sun spots to itch?

Actinic keratoses start out as thick, scaly, crusty skin patches. These patches are usually about the size of a small pencil eraser. There might be itching or burning in the affected area. Over time, the lesions can disappear, enlarge, remain the same, or develop into SCC.

How do you get rid of itchy sun spots?