This is a fear of mine increased pain. For me when I had a lidocaine infusion it increased my pain. Then went on to have other procedure which also increased my pain. My doctor thought that what is supposed to settle the nerves actually revs them up. I have thought of doing ketamine infusions but I am also fearful of getting worse. Sorry to sound negative. We are all different and some people do get relief. I guess with any procedure for RSD you have to take a chance since there is so much unknown and we all respond different