What Are Moles?
Moles are common skin nevi that can be harmless or indicate disease. The medical term for moles is melanocytic nevi (MN). They are circumscribed proliferations of melanocytes in the skin. For the most part, melanocytic nevi are benign and can appear in any mole on a person’s skin. Moles appear on the body as early as childhood, but adults can also get new skin lesions. This phenomenon is normal; moles can change color or size with age.