UC

"Ulcerative colitis (UC) is an unpredictable and chronic inflammatory bowel disease (IBD)."

https://www.healthline.com/health/ulcerative-colitis/tips-manage-flare-ups?slot_pos=article_2&utm_source=Sailthru%20Email&utm_medium=Email&utm_campaign=welcomeemail&utm_term=s:hl_n:dighealth_v:core&apid=&rvid=b12b95083abe9adcb180c3b7f05d5217c65b99fc2d161bfeb6b4ee7a0e22b1c4