I recently had a 2nd bout of diverticulitis followed by an unpleasant, painful colonoscopy. When does surgery become necessary? The doctor that I had with the first episode said that surgery would be required if I had another attack{6yrs. ago}, nothing was said about it this time. I would prefer to never have one but, I don't want it to turn into an emergency situation either, and are chances for a ressection pretty good if there isn't an infection present?