They can appear in a range of colors, shapes, and sizes. Skin moles fall under three types: common nevus, spitz nevus, and atypical (dysplastic) nevus. They may be present at birth (congenital) or ...

Also known as nevus (singular) and nevi (plural), moles are not usually present at birth but begin to appear during childhood and the teen years. They can either develop on the top layer of skin ...