all i can think of is pain medication for nerve pain, but as u said she has tried this..for her age mabye water therapy????
i would consult her dr again or a pain managment specialist.
good luck
yeah, man.. i don't know.. i shattered 2 neck vertebae and had a blood clot at the vertebrae above the fracture and i've had a horrible nerve pain down both arms ever since.. i allso get very cold hands and feet, but thats also due to lossed circulation.. i've tryed two dozen different meds, and nothing has helped.. besides marijuana.. but i can't get a prescription where i live, so i'm kind SOL. the doctors told me basically the same thing.. there is nothing they can do.. i've tryed alot of different stuff, but so far i've had no luck.. all i can suggest is to go on the web and do as much research as you can. i've had alot of luck with alot of my other problems, but not as far as nerve pain goes..
good luck and i wish you the best.