A = Asymmetry: One part of a mole or birthmark doesn’t match the other.
B = Border: The edges are irregular, ragged, notched, or blurred.
C = Color: The color is not the same all over and may include shades of brown or black, sometimes with patches of pink, red, white, or blue.
D = Diameter: The spot is larger than ¼ inch across – about the size of a pencil eraser.
E = Evolving: The mole is changing in size, shape, or color.