My wife suffers from diverticulitis. She went to a nutritionist and made a lot of changes to her diet and takes a number of supplements, including aloe vera juice.
She still gets occasional bouts, but her condition is greatly improved.
I can relate. I have an autoimmune issue which causes extreme pain. I suffered for several years, until I found the right doctor. I now take 1 pill (not a pain killer, a serotonin moderator) daily and life is worth living again. I'm not pain-free and it still flares up, but the pain is greatly reduced, most of the time.