I just had an injection around my coccyx. It worked for s couple days. The thought of removing it is not as foreign now as a month ago, but first I'll try another injection. A pain management doctor administers the injection in a clinic. Wasn't very comfortable but not as painful as anticipated. Hurt more later just from soreness. But if it fixed it, because everyone is different, totally worth it. I found the knee pillow became more comfortable the more weight I lost. I think it's just a thing to get used to.