I just had a procedure called a radio frequency obliteration (nerve block) on Oct 2nd and in the past this procedure has helped. The last time I had this procedure was about a year ago but I do understand the nerve grows back. I have issues with the piriformis muscle. As of today, Oct 12, I am still in pain and not getting any relief from this procedure. Can anyone advise me how long this will take to feel some type of relief. This is extremely painful to me and I am taking morphine for pain relief as needed, the pain is that bad. I don't remember from my last procedure, how long it took to get relief but could use some advise. Awaiting a prompt reply, thanks.........