My insurance company would only approve (pay for) one block, for diagnostic purposes only. The medical reviewer said that any treatment would be so short it would not be worth the cost, pain effort and time.

On the other hand, the people at the pain managagement company (clinc?) said that if you do a series of blocks in short order, and in early stages, there was a possibility of improvement. My first block was 16 years after onset - not exactly early.

Anyway, I had only one block and the fact that it relieved the pain for 12 hours was a clue that I might be a candidate for a spinal cord stimulater trial.

Mike