A mole is an unwanted skin growth. It usually looks like a flat or raised bump that’s the color of your skin or darker. Most people get moles as a teenager or adult. Some moles are present at birth.

Moles form on your skin when clusters of melanocytes, or pigmented skin cells, grow in small, concentrated areas. They usually appear as colored bumps or spots that vary in shape and size and are ...

A mole can bleed if it’s been injured. A bleeding mole may also be caused by skin cancer. If a mole is bleeding and is also asymmetrical, has variations in color, has a poorly defined border, is ...