I had the Radio Frequency Ablation done bilateral L4 and L5. My doctors do not know exactly what is causing my low back pain. They never gave me a name for it, just Lumbago. I had facet joint injections and medial branch blocks before the Rhiziotomy. It worked on those joints, but I still have pain and will be getting another facet injection in my L5-S1 joint. Currently taking Ultracet for my pain. I am only 32 years old and understand what you might be going through. Definately seek a second opinion.