Thats great news that the nerve block is providing you relief! I also had nerve block treatments (9 total and in spine (lumbar) since my CRPS has spread to both of my legs). I found great relief and had a full week from the first shots but after the each time I noticed the relief was not lasting as long.. Each person is different and so I suggest focusing on your success with getting relief because that in itself is a beautiful gift. Also, my Dr. said to do as much as possible when I felt better so that the muscles would start building again. Hang in there and best wishes to u!