I recently went on holiday to Cuba and while I was there I got fairly badly sun burnt. After the first few days the sunburn on my shoulders developed into a thick crust. My girl friend exfoliated this gently with a sponge while I was in the shower and most of the crust peeled away. It left behind lighter patches of skin almost pink in colour which have still remained 2 months after this had happend . I have spoken with my doctor in the past in regards to skin cancer as I was always in the sun when I was a child on holiday. And he told me that it was unlikely that I would develop it due to my strong medataranian heritage and that I was fairly dark skinned anyway. I was using factor 30 when this happend and I really badly burnt after which I went up to a 50 and then down to a 10 after I.had a decent tan and I was fine. Should I be worried about the discoloured skin on my shoulers?.its not painful.