New to the forum, but over 15 years with UC. Onset caused by chemical exposures, primarily formaldehyde. Have managed to control with lifestyle and environment changes (chemical avoidance), and a daily regimen of codeine/caffeine (yes, really!) Recent flare-up is rare and (as you all know) perplexing/depressing/exhausting/debilitating. I found this site when I googled "UC and marijuana" on a hunch. I haven't used any MJ for about 40 years (a clue to my age!) but wondered if the relaxation from it might interrupt the gut spasms. Yes, I found some threads and sense that it is worth exploring. I'm not familiar with this site, but I expect I will report back to one of those threads.