Years ago, I saw an osteopath for almost a year for back pain. He said it was a disc problem, but it never seemed to get any better. I gave up and went to see a physiotherapist who immediately diagnosed that the issue was the sacro-iliac joint, but not disc-related. With a combination of manipulation and running an electrical current through it, my movement was more comfortable and my back pain had gone. It has never returned. I'm not trying to denigrate the osteopath profession, but they can be wrong and it's worth trying an alternative, such as a physiotherapist.