I recently had a flare up of my UC and noticed a considerable amount of back pain as well. I had not even realized there might be a connection but evidently there is. I came to the forum and started a thread about
backpain and got many of the same responses you did. (You might want to look back at some older posts to find other references to back pain and UC).
For me, palliatives helped somewhat, also stretching. I have also been diagnosed with osteopinia (the precursor to osteoporosis) and thought that was all it was. But when the flare up subsided, so did my back pain. In any case, I used the same treatments for this UC-Flare-Up-Back-Pain as I had for the Osteopinia-Back-Pain: cold packs, Tylenol, sometimes even Vicodin, or Flexoral, and bed rest.
59 y/o female
Dx w/ UC one year ago Dec. 2011
Balsalazide Disodium 750 MG 3 tabs 3X day
Low Residue Diet