I too have chronic SI joint pain. Its been bad for almost a year now and is almost crippling. However, the injections did not work for me in my knee so I have doubts. Plus I had the cortisone flare after the knee one and don't want the injections. They won't do an ablation unless you do injections first. There is a newer treatment called Platelet-rich plasma (PRP) injections. I've heard great things about it. If anyone has experience with this please comment. I am finding it difficult to find where to get this locally where I live. Will have to travel some distance. Also, not sure if insurance covers.