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.
Congenital nevi are seen on over 1 percent of newborns. They can be small, or they can cover most of the skin surface. Large nevi are at highest risk for malignant changes. One relatively common mole is the dysplastic nevus . It is broader and larger than an ordinary mole and tends to be irregular in color and shape.