I have been on pain medication since 1995 for bone pain. It is part of MDS. The past two weeks I have had pain on the left side of the back near the kidney.
After numerous tests we determined that the MDS was just causing so much muscle pain from a lack of oxygen going to the muscles.
I also have scoliosis, a spine curvature. The MDS aggrevates the condition.
The pain medication I take is also given to cancer patients. I take Darvocet. Some days I don’t need any, other days I take up to 4 100mg tablets. It is one of the least addictive pain killers.
I have had tremendous relief from the back pain from a chiropractor and a massage therapist. You might try seeing someone like that. I also have heard good things about pain management centers. Good Luck.