Age spots are small, flat dark areas on the skin. They vary in size and usually appear on areas exposed to the sun, such as the face, hands, shoulders and arms. Age spots are also called sunspots, liver spots and solar lentigines. Age spots are very common in adults older than 50, but younger people can get them if they spend time in the sun.

https://www.mayoclinic.org/diseases-conditions/age-spots/symptoms-causes/syc-20355859