Spinal stenosis in lumbar region. I also have MS, so sometimes hard to say what causes the weakness in my legs. I went through several months of physical therapy to strengthen my core muscles but I hit a period of weakness and just couldn’t keep up. I definitely believe the PT helped with strengthening but it alone wasn’t enough for me. I trip a lot-my feet don’t move in sync, and I can’t seem to lift one or the other high enough-and that just hurts all kinds of muscle groups. I had 3 injections two weeks apart, each one helped a little more. The first two were painless and afterward I felt just a strange sensation for a while, almost like buzzing. The third one was painful during the injection, which I felt in my buttock and down my right leg, cramping and burning, but I could tolerate it. I had a hard time sleeping that night, took 4 ibuprofen, and finally fell asleep. Miraculously, when I woke up I was pain-free. That lasted about a month. Doctor said no more than 3 injections in one year. I have heard that some people get up to a year’s worth of relief from the injections. I think they are worth trying. You can tolerate any discomfort and you might not have any at all.