A basic reference chart used for consumers to spot suspicious moles is found in the mnemonic
, A-B-C-D. The letters stand for Asymmetry, Border, Color and Diameter. Sometimes, the letter E (for Elevation) is added. According to the American Academy of Dermatology, if a mole starts changing in size, color, shape or, especially, if the border of a mole develops ragged edges or becomes larger than a pencil eraser, it would be an appropriate time to consult with a physician.