Age Spots (Solar lentigo)
Solar lentigo (age spots) is a condition caused by sun exposure. In older people, this type is common, but it can also occur in younger people. UV radiation causes melanocytes, which are pigmented cells in the skin, to multiply. Affected areas include the face, hands, shoulders and arms, all exposed to the sun. Over time, the spots may become more prominent. Some people refer to solar lentigines as liver spots or sunspots.