Hello!
1st, I hope you start feeling better soon. I'm guessing by this time you have already had the procedure completed? If not, it's not as complicated as the name states. But when I heard what is done I became so scared. Much to my pleasure, it wasn't even a fraction of what I anticipated.
In the simplest of terms, they use a needle type thing that heats up and burns the tiny nerves that can cause pain. ( i couldn't feel it) For a lot of people it helps. For me it didn't because we found down the road I had something else going on. If you haven't had it done yet, look up Radiofrequency (RF) rhizotomy. You will find a lot of information, and it will explain it far more, and better, than what I can!
Good luck!
Jen