I was told that I could have been allergic to the preservative that they use in the steroid shot I've had one in my t6 - t7 and several trigger point injections in my sciatic joint and areas around it, both times I ran a fever and was in excruciating pain in the areas I got the shot and all my joints not anywhere near where I got the injections.i hurt so badly noone could touch me and i couldn't stand up without help i was weak as a kitten. Can u tell me what kinds of preservatives they use so i can avoid them? Im desparate for pain relief without surgery. I am only 34 and this sucks!