I have a tiny, round feeling bump under my skin on the back of my shoulder. A few years ago I was in Ft. Lauderdale and neglected to use sunscreen while jetskiing. Due to this stupid mistake, I also have procured some freckling on this same shoulder from skin damage. This lump is painless and for a while could only be felt when pushing on the area. I can now see where it is located, though it hasn`t changed in diameter. There`s no coloring or pain- only when pushing to try and drain it. Also, recently i have discovered on the front side of this same shoulder a U shape, very faint, red exema looking scratch (Im not sure how else to describe this new mark). Im starting to get worried about skin cancer. Im 18 and have no insurance so please help.