Sorry that you are going through all this. The docs had me icing in the beginning too and wearing a boot for a couple of months (diagnosed an ankle sprain in the beginning). Did the burning stop before or after the block? The very first block I had didn't help with the pain but the whole thing with my leg getting ice cold went away (for a few months anyway) after that first block. You just never know with RSD...but it's a good thing if the burning has gone away.