Many people with dark skin don't use sunscreen and stay out in the sun too long. Some believe that their skin tone will protect them from dangerous ultraviolet rays. This is a big mistake: people with darker skin are more likely to die from skin cancer than those with lighter skin.
While dark skin offers some protection against the sun, skin cancer is usually diagnosed later and tends to be more aggressive.
Very dark skin provides the same protection as sunscreen with an SPF of about 13. Dermatologists recommend sunscreen with a minimum SPF of 15 and limited exposure to the sun. All people, regardless of race, should use sunscreen liberally, avoid excessive exposure to the sun and examine their skin regularly for skin cancers. See your doctor if you have any unusual skin growths or blemishes,