I've had collagenous colitis (aka microscopic colitis) for 8 years. I'm 69 and 14 years ago my gluten intollerance morphed into celiac after catching H1N1 (gluten free). I've kept a food log for 14 years so I was able to see that most legumes and a few other things caused flares; my GI said avoid all NSAIDs because they irritate the GI tract. My autoimmune diseases are controlled by diet, destressing (not that easy when one is ill), exercise, and getting enough sleep/rest. Consider an elimination or FODMAP diet to see if that gives you info to control the flares. Chrons is a nasty disease.