Moles are benign skin growths that are commonly black or brown. The can occur in children and may continue to appear throughout a person's life. They also often change in color or shape. There are several types of moles; some more prone to skin cancer than others. Get any noticeable changes to a mole checked by a dermatologist to be sure skin cancer has not developed. Moles may be removed for evaluation or for cosmetic reasons. Follow the links below to find WebMD's comprehensive coverage about how moles develop, what they look like, how to spot skin cancer, and much more.