These are common skin growths that are usually tan or brown in color, sometimes raised, and come in a variety of shapes and sizes. Over time, some moles may change, becoming lighter in color, or bigger. Sun exposure and family tendency (heredity) play a role in the development of moles.
Moles may sometimes become warm or red in color (inflamed) or irritated by friction from rubbing or contact with rough clothing or by other types of injury. Dermatologists may remove moles surgically or shave them down to stop irritation, to improve appearance, or to prevent the mole from becoming cancerous.