D = Diameter Melanomas usually greater than 6mm (the size of a pencil eraser) when diagnosed, but they can be smaller. Click here to download the AAD's body mole map to document your self-examination and know what to look for when checking your spots.
Sun exposure is the most preventable risk factor for all skin cancers, including melanoma.(3,4) Take these precautions: seek shade when appropriate; wear protective clothing, such as a long-sleeved shirt, pants, a wide-brimmed hat, and sunglasses, where possible; generously apply a broad-spectrum, water-resistant sunscreen with a Sun Protection Factor (SPF) of 30 or more to all exposed skin; use extra caution near water, snow, and sand because they reflect and intensify the damaging rays of the sun, which can increase your chances of sunburn; and avoid tanning beds.
Prevention is the best medicine!