Hi, I,m trying to find out about nerve block therapy. and what is it. Had back surgery about 11/2 years ago,I had stenosis in lower back. Now its been a year and 1/2, I,m starting to get pain where they went into my pinal canel. I don,t want no more cordizone shots. I just found out about Nerve Block Therapy. How does that work,and would that work for me.