Do it the same way every time. To help you look at difficult areas this examination can be done with the aid of a spouse or friend. Basal cell carcinomas may appear as a rough patch of skin with a central ulcer and may intermittantly bleed. Take a close look at all moles because this is where melanoma begins. The following, known as the ABC's, are warning signs of potentially cancerous moles.
Common moles are usually symmetric.
Draw an imaginary line through the center of the mole. If one side is noticeably different from the other, the mole is asymmetric and may be a problem. Common moles are usually one color. Multiple hues or colors is a warning sign. A diameter greater than 6 mm is a warning sign Take notes on your findings and see your doctor.