What is a Mole?
A mole (nevi), technically known as a melanocytic naevus, is a small, dark spot on the outer layer of the skin (epidermis). According to the American Academy of Dermatology, the majority of moles appear during the first two decades of a persons life, although some may not appear until later in life. Perceived by most people as a dark brown spot, moles can also be yellow or blue and can be of various sizes and shapes. Moles can be flat, raised, elevated and dermal, appearing anywhere on the skin but especially on the arm, head and neck. Sun exposure may darken existing moles and increase their number.
Moles are a member of the family of skin lesions known as naevi. Moles occur when cells in the skin grow in a cluster instead of being spread throughout the skin. These cells are called melanocytic, and they make the pigment that gives skin its natural color.
