Dry patches possible skin cancer?

first off..im 29,have kids and live in the desert.
i noticed not too long ago 2 small dry patches of skin on my upper left arm near my shoulder. ive looked at tons of skin cancer picts and they dont look like any of the picts. Their maybe the size of the eraser tip of a pencil and are round,flesh colored,flat and dry. they dont itch at all and wont go away. could this be some kind of dermatitis,harmless dry skin or does it sound like skin cancer? i know youll all say go to a doc,which i will..but in the mean time id like to hear what you think. thanks

Its winter where you are right?...I get eczema & in winter I tend to get extra spots from clothes rubbing on goosebumps and hot water when showering in cold atmosphere does it too....the only other thing i can think of is a ring worm off a cat or something....try a cream with cortisone in it....its quite possible that you have a bit of dermatitis & this will help...it definitely won't hurt anyhow....doesn't sound too major...my boyfriends gets similar spots now & then and he just uses some of my cream which makes it go away...go look up some dermatitis websites & see if you can find a similar pic...Good luck...