I have it as well, it's an AI disorder so of course gluten has to be completely eliminated. Corn is #2. You have to read labels, familiarize yourself with everything that's made of corn and pretty much give up almost everything even slightly processed. Rice, for me, is probably the least bad, but it's still not good. I'll have a small bit of something made from it about once every few months.
Try supplementing with turmeric and zinc. I take others as well, but those two are key. And read every label for the possibility of cross contamination. I accidentally ate some macadamia nuts that were possibly contaminated, they were, and had a new flare up a few weeks ago. Still battling it back.