When ulcerative colitis goes into remission, it can be judged from the symptoms, colonoscopy and blood tests. 1. Symptoms: When patients with ulcerative colitis enter into remission, the clinical symptoms will basically disappear, such as the disappearance of abdominal pain or only minor abdominal discomfort, the number of stools per day and the character of the stools to return to normal, no longer pus and blood stools, nausea and vomiting symptoms have disappeared. 2. Enteroscopy: when patients with ulcerative colitis enter into remission, the intestinal mucosa of the patient is basically normalized. 3. Blood related examination: Inflammatory indexes basically return to normal, such as neutrophils significantly reduced to normal level. It is recommended to consult a doctor if necessary and have regular review.