There are several kinds of brown skin spots. A dermatologist is specially trained in detemining the exact nature of a particular skin spot. Some brown skin spots include seborrheic keratoses, freckles or
ephelids, lentigo or lentigines, melasma, and moles. Moles are also called nevi (plural) and nevus (singular), and these may or may not be of a cosmetic nature. Lay terms often used to describe brown
spots on the skin are: age spots, sun spots, liver spots, and freckles. The term seborrheic keratosis is a medical term and is a specific diagnosis.