John Cena is opening up about a past skin cancer diagnosis in an effort to bring attention to the importance of wearing sunscreen.

The ABCDE rule is a simple guide that can help identify potential signs of skin cancer. This comes after John Cena recently revealed his skin cancer diagnosis to raise awareness of what can happen if you don't take appropriate action.

John Cena has faced some of the most dominant forces in WWE history, but his biggest battle was outside the ring. As he prepares for the Undisputed WWE Championship, the 16-time world champion is also fighting to raise awareness about sun protection after revealing a past encounter with skin cancer.