Can Severe (electric shock-like) Pain be a sign of Regeneration?

Hello, I'm writing here on my sister’s behalf in an attempt to find some reasonably solid answers to the question posed in the title of this discussion.

I have been able to find tantalizing clues online that suggest that peripheral nerve regeneration can be accompanied by tingling and pain, but nothing that seems particular to my sister's circumstances. What follows is an attempt to frame the question more specifically, and to ask if such a supposition even makes sense in my sister's case.

In a nutshell, and based on a variety of symptoms and an MRI, she was diagnosed with Cervical Myelopathy - I'm not sure about any further specifics, i.e. which numbered vertebrae are involved. She has had two surgeries. The 1st was by a spine surgeon who implanted a bone graft, and the second was by a neurosurgeon who removed the bone graft (while condemning that approach in no uncertain terms) and proceeded to fuse certain vertebrae - again, I'm not sure which ones. Subsequent to the second surgery she was in a neck brace for several months and unable to take any steroids or OTC pain relief meds as they can inhibit bone growth. Once she was able to remove the neck brace, and based on an evaluation of her progress, she was told that this abstention from steroids, et. was to continue for at least another 6 months.

Around the middle of month three and after considerable improvement of many the more painful symptoms, she suddenly started experiencing what she described as unbelievably painful electric shocks in the ulnar region of her left hand - pain that, at it's worst she said was comparable to child birth contractions. In response she was given prednisone. Five days after an initial round the pain returned and she was given a second round. She just had an emg done which did not show anything that would account for the severe pain. She has other appointments scheduled for this week, but thus far no one has advanced a workable theory to account for these pains, or put them into perspective - much less how to mitigate them going forward.

Numbness (etc., in her left hand), and loss of function in the pinkie & middle fingers, and to a similar, but slightly lesser extent on her ring finger were some of the initial symptoms prior to diagnosis, and have progressed significantly since then. But the excruciating pain in the left hand is completely new & unprecedented.

So, given the above, and based on the collective experience of this group, I’m asking if the supposition embedded in the title question (“Can Severe (electric shock-like) Pain be a sign of Regeneration?”) could actually be a positive consequence of the second surgery, or largely an exercise in wishful thinking?

I would greatly appreciate any wisdom (anecdotal or otherwise) on the subject that anyone would care to offer!

And finally … My sincere thanks (and apologies) to anyone who has had the patience to read this all the way to the end!!