I am not a sun worshiper, but I have had to be outside a lot this summer. I have had a couple of odd bumps form on my forearm that weren't there before a couple months ago. They don't have any real color other than skin color, are dry and flaky, and not really uniform in shape. Any idea what this might be? I've tried googling skin cancer, and it doesn't look anything like the photos. Not painful, just don't like having a couple rough lumps on my arm.