How long do they usually last? I had one a month and a half ago. At a month the pain started to return in my lower back and hips and now my leg pain is coming back as well. Its to the point now that i'm having trouble functioning again. I just want to curl into a ball and not move because of the pain and i'm tired all the time again. I really don't want to have to call and make another apt. for another injection but it did help the first time. Painful definitely!!!!