My forearms show small light and dark areas (look like freckles) that I've been told are just a normal result of too much sun. Lately I've noticed that some of the lighter/whitish areas (about 3-7mm) appear to be getting burned when I'm in the sun too long, and sometimes bleed/scab. At first I thought they were just scratches or cuts, but now appears to correlate to sun exposure and those white patches. Sometimes the whiteish patch is dead skin, and if I scrape that away, there is a red area that almost looks like a blood blister. They appear to heal up fine, but slowly. Is it just an area missing some pigmentation and hence more prone to sunburn, or something more serious. I'm being more careful about sunscreen but still get a lot of sun. It happens mostly on my left (driving, arm on the door, lots of sun) arm.