Use the ABCDE rule to recognize symptoms of melanoma.
A = Asymmetry. One half of the mole looks different than the other half. (top left image)
B = Border. The edges are often ragged, notched, or blurred in outline. The pigment may spread into the surrounding skin. (top right image)
C = Color. The mole is more than one color. Shades of black, brown, and tan may be present. Areas of white, gray, red, pink, or blue may also be seen.(bottom left image)
D = Diameter.There is a change in size, usually an increase. Melanomas can be tiny, but most are larger than the size of a pea (larger than 6 millimeters or about 1/4 inch). (bottom right image)
E = Evolving. The mole has changed over the past few weeks or months.