Almost all teenagers and adults have moles. They generally develop during childhood through young adulthood. They are made up of melanocytes, pigment containing cells of the skin. Normal moles are usually a uniform light to medium brown color and round or oval shape. They may be flat or symmetrically dome-shaped and raised. Congenital moles are present at birth. These are frequently larger and darker than other moles.
Although most moles are harmless, some may develop into melanoma. Moles exhibiting any of the following warning signs should be examined by your dermatologist:
- Larger than six millimeters
- Itching or bleeding
- Rapid change in color, size or shape
- Multiple colors or very dark brown/black color
- Asymmetry or notched borders