Exercise definitely helps but it doesn’t actually seem to turn the nerves off, just desensitize them.
Sitting is very painful as I get pain in my sit bone and shooting numbness down my leg and all the way into my foot.
I have almost given up and accepted that I will be a cripple for the rest of my life. I live in British Columbia where the medical system is OK, but not near world class and all of the ambitious doctors have went to the USA.
I have a very bad bite which makes me suspect that my whole posture is messed up from the top down.