Mine first began to spread after I had a lumbar sympathetic block meant to help the RSD in my left ankle. The spread pain started at the injection site in my lower back, then crept up my spine, the to my neck, then shoulders, around to my torso, then down my arms, and eventually to my hands. later...it spread up my leg to my knee, and after a bump from a visiting nephew it spread to my left hip. just last year I had a baby via c section and I now have the RSD internally in my abdomen where they sliced through all the nerves.