Hi, thanks for the question and I am very glad to help you with your health concerns.
Coming to the discussion;
Based on the description provided by you it sounds like your wife is a case of failed ulnar nerve transposition surgery. Usually rerouting the nerve is a highly successful surgery, but unfortunately in her case it is not helping and she is torutured with lots of severe symptoms including pain, burning, numbness etc.
There are various reasons why surgery rarely fails in ulnar nerve rerouting surgery, and such reasons generally include one or more of the following – fibrosis or scar development which compresses the nerve, retention of a soft tissue structure by name “medial intermuscular septum” during the first surgery, development of adhesions of the nerve to the surrounding structures, or recurrent slipping of the nerve from its new rerouted position etc.
As you see there are myriad explanations why she is having such severe symptoms after this surgery. If the surgeon who did this first time is not able to fix this then you may please try to see another surgeon. A Neurosurgeon or an Orthopedic surgeon are the usual surgeons who does this procedure. They can revise the surgery and make sure this time nerve is put in a safe area in the forearm and does not undergo irritation by any fibrosis or scar tissue etc, also see that the nerve does not slip from its new intended position.
In the meantime she may try one or more of the following treatments to get relief from her severe symptoms;
One of the nerve-pain pills like Gabapentin or Amitriptyline or Pregabalin
Lidoderm anesthetic pain relieving skin patches
TENS (Transcutaneous Electric Nerve Stimulation)
Truegevity 024 Pain Relief Towelettes
Opioid/narcotic pain pills like Percocet or Oxycontin etc
Please let me know if you have any further questions; and if you feel you have received the answer to your question please rate me so that I can receive credit for the time and effort put by me in answering your question.