longest nerve in the body, goes all the way to the big toe and if you pinch it when it exits the spine,, yeah.
I have a back swing that's brilliant, those things you lay on and get turned upside down, This takes the weight off your spine and stretches the joints just a little but enough to stop the pinch.
There are a few exercises like right knee left shoulder but only a few days after the initial injury as the tissue needs time to relax and the swelling to subside. Voltarin is pretty good too.