Sun exposure is the primary cause of most skin cancers.  Skin cancer is caused when UV radiation causes DNA damage, which initiates a string of activity that results in DNA mutations and a breakdown in the immune system.  It is absolutely essential that sunscreen be applied on a daily basis for protection and health.  Young people, too, are prone to skin cancer as melanoma is the most common cancer for those between 25 – 29.  Melanoma rates for women from age 15 – 39 have soared 50% since 1980. Children can get melanoma, too.  The percentages have been rising since 1982.