There isn't anything currently available that can repair damaged nerves, and IMO, there never will be. Once a nerve has been cut, damaged, or has died, that's it. They can treat the symptoms to a certain extent for some people, but there's NO CURE. It's a lifetime diagnosis for those of us who suffer with the numbness, burning, and pain caused by this condition.
I started having symptoms over 10 years ago, when I got home from work my feet began to be painful with some burning. It began to worsen over time to the point that this, along with the worsening osteoarthritis in my knees and hips, forced me to walk away from my job after almost 17 years, and go on permanent disability. Next week will be 10 years of living in chronic never ending pain, burning, and numbness.
Buck up, it's going to be a long, bumpy ride.