Epidural Steroid Injection of Kenalog. I asked about side effects and was assured it was a safe procedure. Within a few weeks I started suffering from pins and needles in hands and feet which progressed to severe burning pain over most of my body. I now live in constant pain (far worse than my original back pain) and have been told that I probably have Arachnoiditis as a direct result of Kenalog shot. Steroid injections in the back are at best only a quick fix and I would NEVER have had it had I known of the possible side effects. This injection has ruined my life.