Do you have a mesh top? We need to figure out the problem first... If it's a mesh top with a light on it, then its too hot and it is dangerous for your animal. (the mesh is too hot) I would suggest you change your enclousure. My first bp was in an aquarium with a mesh top. His nose always had rubbing issues. I got smart and bought a tub.
I really think its a bad shed. Don't worry about it. It will come off soon enough. Every time she drinks, water will loosen it up. Just check your humidity next time she goes into shed.