I also had an ESI done yesterday. I was up quite a bit last might due to pain. Most my pain is in the lower back, and for some reason getting muscle spasms or nerve twitching in my neck /arms , and hands. That seems to be a bit better this morning though. Took a Vicodin 2 hrs ago that didnt due much for my back. All I can think is a small percentage of patients according to my paperwork, their symptoms feel worse for a few days before you feel better. I use ice during the day off & on. Its defenitely hard to find a comfort zone.