White spots on upper arms?? keratosis pilaris??

I have these blotchy white spots on both of my upper arms. The spots are drier than the rest of my arms and look bumpy, but aren't. I researched it and came up with a disease called keratosis pilaris, but it pretty much had nothing that you could do for it. It suggested rubbing certain lotions on it, but I've tried that and it hasn't seemed to help. The only thing that really helps is if I get some sun, then it reduces their appearance. But I won't be able to get sun all the time, and I am so self-conscious about them, I feel like I can't even wear sleeveless shirts. Any ideas of what I can do to in order to make them go away or at least to reduce their appearance without just getting a tan?