They can be present at birth or acquired throughout life. The incidence of nevi increases throughout childhood, peaks in adolescence, and typically wanes in older adulthood. Nevi evolve and change throughout childhood and during pregnancy.
Moles can appear anywhere on the skin in various sizes and shapes.
Moles typically evolve and grow as we do. They generally begin as flat brown spots, similar to a freckle, that, over time, may grow larger, become elevated, and grow hairs. Back to Top Certain types of moles carry a risk for developing malignant melanoma, a serious form of skin cancer. Sunburns, particularly in childhood, can increase the risk. Some moles are present at birth.