Since you have had to do more than one of these, you have something that is mechanically causing inflammation. Have they figured out what it is? What does your MRI say?
Welcome to the boards. What was your surgery done for? Condition?
When my husband had his surgery done, he had to sign a piece of paper that said, the pain may be less, the same, or more, after surgery. The nerves are really tricky things. It is depressing.
They use the shots to rule out what it is or isn't. Getting relief is a bonus. Since the shot didn't *take* they can now move onto some other form of helping you find relief.