Hyperpigmentataion and skin cancer? Dou you know what I mean? After i got a sunburn once i got a couple brown spots on my shoulders. They dont have any black, red white, or any other colors in them, they are just brown. The skin on they area where there are is smooth( its not bumpy or indented). How does one tell the difference between hyperpigmentation and sunspots from the sun and skin cancer?