My little Worm had an epic bad shed where he pulled a couple of scales off his head, failed to get the rest off, and was bleeding and shivering. There's a thread about it somewhere, but I'm on my iPhone, so searching is up to you if you're interested. Anyway, what's ended up happening is just that he went into a faster shed cycle, I have to watch and help him out, and it seems to be healing just fine. He's a snow, and from what I hear when they do scar it tends to be white, but these scales were on the pink part of his head, and you can no longer really tell it happened at this point. We've yet to reach that perfect shed, but he's getting better every time!
I give him a humid hide when he starts a shed cycle, and earlier on I was treating him twice a day (then just daily) with neosporin, the kind without pain medicine. I took him off his aspen and kept him on newsprint until there was nothing for the Aspen to stick to anymore. Beyond that, I just keep a close eye on him, and when he tries to shed and only gets part of it, I get the rest for him. I'm hoping one day he makes it back to normal, healthy shedding, but even if he doesn't, he isn't ripping off scales anymore, so it's all right-- fingers crossed. Bad sheds are a lot less scary than they seem at first, even the REALLY bad ones, once you get a system for handling them. And the lovely people on this site are very helpful too! Nanci was kind of Worm's Guardian Angel when he started having these problems. I hope yours turns out all right too!