From the site RSDHOPE.ORG or http://www.rsdhope.org/Showpage.asp?...2&PGCT_ID=4410

"As your RSD progresses, the SMP is gradually replaced by IMP or independently Mediated/Maintained Pain, that is brain-centered/generated. "
IMP=SIP

"sympathetic blocks no longer works as the pain becomes SIP"

I`m sorry to tell you this, but I think it is important to stay on top of it, and together with your doc decide the next step. Stop blocks when they don't work for you

there are still medicin to try

T