In 2020 after surgery did he change his diet or hydration rate or did he make no dietary changes? IBD issues in all their forms, take discipline, fortitude, and sticktoitiveness....when symptoms are gone, it doesn't mean anything is fully healed, you have to commit to what works forever....my cousin goes back every 7 years for resection for Crohn's, each time a harder recovery....I have told him what I did for remission of UC since 14' but he only tried one of my suggestions and didn't even follow thru with just that one thing....does your stool have pus, tar, mucous, blood? If yes see if you can get meslamine enemas, and use gravity to pull that enema Into your intestines, and stop all fiber during enemas so your bowels can rest and heal, just go liquid, once stool looking good, then hydrate every day with coconut water, which hydrates & is a natural inflammatory, inner-eco LIVE liquid probiotic is fantastic, as well as combined with a coconut milk yogurt a day,