Each person has about 10-40 moles on his body. Moles are generally not dangerous, but moles that have color, size, or abnormal shape can be an early sign of skin cancer. The skin has dye-producing cells (pigments) called melanocyte cells. When these melanocyte cells grow close together, a mole forms. Melanoma, one of the most dangerous types of skin cancer and is now quite common, occurs when melanocyte cells grow out of control. In its early stages, melanoma can be difficult to distinguish from normal moles. Difference Between Normal Moles and Melanoma Although sometimes it can look similar, normal moles and melanoma skin cancer have some differences. This difference can be seen from: 1. Size or diameter Normal moles are usually less than 5 millimeters in size. If there is a mole larger than 6 millimeters, then the mole needs to be aware of. 2. Form Normal moles are usually oval or round in shape. If you pay attention, the mole looks symmetrical. In skin cancer, moles are us...