Hi Welcome,
I just wanted to say "hello" and agree with what the pervious members have said. I did have the blocks, they were temporary pain relief for me. I also had the sympathectomy, grant it that was years ago, but I had spread following. I can't say if the spread was from that, the shoulder surgery or just because. But, I really haven't heard of anyone that it may have prevented spread or lessened the pain permenately. Having said that...there may just be that one person. You never know. I, am adovcate for HBOT. That is quite frankly, because it works for me. The benefits are many. I have had CRPS for 20 years in July, and this after all other treatments failed miserably, worked the best. Good luck with finding a treatment that works for you. Keep asking questions. I hope you feel better soon. Di