I have been diagnosed with arthritis in my lower back into my SI joints about 8 months ago. This past week I have been in the same pain, same spot. It s in my lower back, on my left side. I can hardly walk. It s constant. It s just in one spot, I ve tried everything from taking my medicines, massages, resting, hot & cold compresses. I don t know what else to do or what else it could be.