What characteristics will a cancerous mole likely have?

ABCDE's of mole chec. Atypical moles that resemble melanoma often has one or all of the following characteristics: a for asymmetry; b for irregular borders; c for lots of different colors (or shades of brown); d for rapidly growing diameter; e for evolving or changing mole.
Altered color, Bleeding, change in size, with irregular edges, and growing both upward and outward. See an expert. Don't guess.