New account so this will get buried but BPC-157 injections worked for my tendinitis in both forearms. I wouldn't call it a cure because I have to continue using it occasionally or it comes back.

It may not help with your issue because that sounds more nerve related. I'm not a doctor.

I should also mention some other things I have tried or still use: Kinesis Advantage2, Vimium, i3/sway, better chair, better posture, neck/scalene stretches, less laptop keyboard use. It all probably helps in some small way.