Learning how to do a skin self-exam could save your life.

“Skin cancer is one of the few cancers you can see with the naked eye,” said Dr. Ali Hendi, an assistant clinical professor of dermatology at Georgetown University Medical Center in Washington, D.C.

“Yet sadly, many people don’t know how to be their own hero when it comes to skin cancer, including what to look for on their skin or when to see a board-certified dermatologist,” he added in an American Academy of Dermatology news release.