If you find an unusual growth, see your primary care physician immediately. Asymmetry Check the skin for lesions that are asymmetrical. The shape of one side of the affected area does not match the other. Normal moles are round and symmetrical. Border Look for lesions with ragged or blurred borders, or irregular outlines.
Normal moles have smooth, even borders.
Melanomas may be shades of black, brown, red, white, or blue. Normal moles usually have a uniform shade. Diameter Look for a lesion to change in size, usually increasing. Normal moles are generally smaller.