Peripheral nerves are well known to regenerate, but the spinal nerves do not (or very limited). We do not want nerves to regenerate in most cases because it co

Peripheral nerves are well known to regenerate, but the spinal nerves do not (or very limited). We do not want nerves to regenerate in most cases because it could cause even worse results. If you start regrowing a batch of nerve, you have a chance of growing out nerves that transfer pain signals into places you don't want them to be, which could cause persistent neuropathic pain (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290455/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290455/).