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.

Lots of us have moles, but not all of us know when we need to worry about them. We think they're just a part of our genetic make-up, but they're not always good for our health. They can change, grow ...