I use to get blocks one every week for about 6 weeks I have RSD in both arms. I now get the blocks every day for 6 days and then move right - left - right and this has work the best for me I have been getting blocks since 1984 and some years 2 rounds a year. Just make sure you have a Doctor who cares and is will to work with you and also get a second opinion, I had TOS surgery and I did not need it and I'm having problems because of that surgery. I read here all the there are great people here I'm glad i found the site there are two things to remember if doing surgery get a second opinion and find a good Doctor it took me 15 years to find one but you can live with it I'm going on 31 years keep the hope up