Hi, I'm not sure how to classify the type of reoccuring sacroiliac joint pain I get, but I have found something that works for me if I take it daily, in the morning, on an empty stomach (I have had digestive issues when taken with foods and some people say that tumeric extracts block absorption of iron, or other minerals, in meals).
It is a 500mg black cumin seed extract, called Thymocid, which I take in a combo supplement by Life Extension which includes 250mg of Bio-Curcumin (tumeric extract), also. This particular product, though there may be others, is called Black Cumin Seed Oil With Bio-Curcumin. Maybe it is the Thymocid alone which helps, but I haven't tried other brands yet. I do know that super doses of curcumin alone doesn't help my joint pain.
I did not test positive for HLA-B27 and my SI joint pain occurs independent of any digestive flairs, but is directly related to not enough sleep and D3. I only get joint pain in the sacroiliac joint, nowhere else. My useless doctor suggested I start taking Pentasa daily for this axial joint pain--in my opinion, Pentasa is an expensive placebo, which may have limited efficacy for those with colitis symptoms and maybe peripheral joint pain, foisted onto crohn's patients with generally mild cases.
If I take 2 capsules of Life Extension Black Cumin Seed Oil with Bio-Curcumin daily, I don't get my si joint pain. I just ran out three days ago, and last night I had my first episode since starting this stuff, about two months ago. It's proof enough for me to post about it. Thankfully, I've got another bottle coming today in the mail.
Do a scholar.google.com search for "The Joint-Gut Axis in Inflammatory Bowel Diseases" and maybe do another for Black Cumin Seed and inflammation or ibd to see why this might work. I still haven't parsed through that first article... Here's a link describing Spondylitis:
http://www.spondylitis.org/about/faq.aspx