great advice everyone else... but I would like to start with my basic questions to help you! hopefully...

how often she chews herself?
on what part? does she chews from one to another? or tend to go back to the same area if she doesn't chew herself daily?

this problem sounds really serious for my idea, but worth a try? only if she chews herself and leave a few small spots.. you can get a "YUCKY-ICKY" cream from veterarian specifically and apply to the area around the injury part. let's hope she'll not love the flavor! one of mine does... but rare. anyway, if this works, I'll want to pray if she could take this out of her habitation. I'm gonna to do a necessary research (because it's happening to one of mine too) and hope to find a solution soon! good luck on yours too.. hear from ya.