I would get her dr to do a mri. It sounds as if she could have developed a problem with her disk. There is a chart on my profile that shows nerve conduction and it may be helpful. If the dr does do test remember mri's are better at showing soft tissue ct scans are better with harder things. Best of luck to you both, Sissie
The doctor prescribes only vitamins -- what kind of doc is this? Man, I'd be out the door to a new doc in a flash.