I have had three roaster comb injections, The first two helped me so much but I have been in complete misery after the third one. My knee is red, very swollen and the knee cap feels like it is slipping out of place and the nerve pain running down my leg into my ankle is almost unbearable. I went back to the Dr. and he said I had a reaction (one in ten thousand) and that also the shot could have gone into the wrong place -I forget the word he said. Please help me if you can. I go back in two days but he didn t seem too concerned and I am not even able to sleep at night because of the pain. Thanks so much Sandra