Ive had 1 block done and it did help for about 3 days. Then I was back to the everyday pain that nothing worked on. I was just reading an article that went in depth of treatment for crps. Pretty good article too. I can't remember the site now but if you Google crps treatments you will find it. Even had some pics and videos. It was a Drs site more than a patients but I still read it. Very interesting stuff. It took them almost 10 yrs to finally figure out what was wrong with me. I will go back and find the site and post it for you. I hope it helps.