This happens to a lot of people. I personally didn't get much relief at all from the blocks (pretty much only that they stopped my leg from getting ice cold for several months). But if you are noticing a difference in the burning pain (lower at all) then it still may be encouraging. Some people have said that it was after their third one that they really felt the relief. Sometimes it's just that the spot may not be QUITE right. And unfortunately sometimes they just don't help some people. There are probably other things that it could be too. But it doesn't sound like you should give up hope quite yet. Definitely discuss it with the doctor and see what they think. You don't HAVE to continue the blocks if you don't want to...but maybe your doctor will have some ideas about how to get better results.