I also had the treatment with TKR, and experienced terrible nerve pain and knife like pain following the procedure. I went back to my surgeon, who approved the block procedure but was not the doc that administered it. My surgeon prescribed a steroid treatment after explaining it was neuritis, inflamed nerves as a result of the block. It helped immensely, but as soon as I completed the coarse of steroids, it returned, although not as intense. I’ve since had a second course with same response. I am 4 months out and have exchanged one pain pre op, to this knife like pain post op. I would never have done this had I been advised of this possibility and I did not find anything about this side effect when I did my research. My surgeon feels it will improve as the block wears off and the healing is complete that could take up to 12 months. I am still experiencing a vice grip numbing sensation mixed with knife like pain through out my knee with movement. I would never do this again and praying it will resolve.