The criteria for remission of ulcerative colitis are actually very simple, mainly the disappearance of clinical symptoms, normal mucosa after colonoscopy, no symptoms after discontinuation of medication or only maintenance medication, and no significant recurrence if observed intermittently for six months, is basically cured. If the mucous membrane is mildly inflamed and some pseudo-polyps are formed on review by fiberoptic colonoscopy, this is also a criterion for basic remission. Of course, the symptoms of ulcerative colitis vary, and the criteria for remission may vary widely, so the general principle is that the symptoms disappear or are effectively controlled, such as diarrhea is no longer diarrhea, stomach pain is no longer painful, abdominal pain disappeared are the criteria for remission. It is better for patients to have a colonoscopy to clarify the symptoms of remission.