Skin Cancer Signs: How to Check Moles With the ABCDE Rule
The main warning signs of skin cancer are a new spot, a spot that looks different from your other moles, or a mole that changes in size, shape, or color. The ABCDE rule (Asymmetry, Border, Color, Diameter, Evolving) and the "ugly duckling" sign give you a simple way to check your moles at home. If any spot changes, itches, bleeds, or does not heal, have a dermatologist look at it. This article is for general information and is not medical advice. Key takeaways About 1 in 5 Americans is estimated to develop skin cancer in their lifetime, and about half of melanomas are found by people checking their own skin. The ABCDE rule flags moles that are lopsided, ragged at the edge, multicolored, larger than a pencil eraser, or changing. The ugly duckling sign means a spot that looks unlike all the other spots on your body. It deserves a closer look even if it passes the ABCDE check. A monthly head to toe self-exam with a full-length mirror and a hand mirror takes about 10 minu...