It’s recommended everyone get a baseline skin check for cancer in their early 20s. It’s especially important if you’ve suffered skin damage as a kid. Mayo Clinic Dermatologist, Dr. Alison Bruce:

“If you’ve had blistering sunburns during your youth or if you’ve used tanning beds, that’s another significant risk factor for developing skin cancers and melanomas.”

Bruce says dermatologists use skin checks to identify moles that might put you at risk. In particular, they look for asymmetric moles, ones with jagged borders, multicolored moles, and any that are bigger than six-millimeters.