@salamanca It's possible that your pain is being aggravated by tight surgical scar tissue. With several surgeries, each will have added new scar tissue. You might be interested in myofascial release which is a way to stretch out tight tissue and scar tissue. I have done a lot of MFR work myself and it has helped me a lot. I have done MFR to help after surgeries for an ankle fracture to equalize the tension between both sides of my ankle. I've also had MFR for treating some other conditions, and after my cervical spine surgery to loosen scar tissue.

There is a provider search at http://mfrtherapists.com/

Stem cells would be involved with tissue regeneration. I think that the work that Dr. Bydon does is research toward spinal cord nerve regeneration for spinal cord injuries.

Neuropathy - "Myofascial Release Therapy (MFR) for treating compression and pain"
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
I know as patients, we look for answers and hope for solutions. You might be surprised if you try MFR.