Ulcerative colitis is a disease that cannot be completely cured at present, with active and remission phases, alternating episodes and remissions, and the duration of symptoms is uncertain. Ulcerative colitis is an inflammatory lesion of the rectum and colon of unknown etiology, mostly slow onset, prolonged and recurrent, in the active phase there will be diarrhea mainly manifested as mucus, pus and blood stools, abdominal pain, urgency and heaviness (discomfort in the lower abdomen, wanting to relieve the stool, and a feeling of incomplete defecation after defecation), and other symptoms can be relieved through systematic treatment. The main treatments include general treatment (rest, pay attention to diet, correct water and electrolyte disorders, and give pain-relieving treatment if necessary), medication (oral + local medication such as mesalazine for mild to moderate cases, and glucocorticosteroids and biologics are needed for moderate to severe cases), and if the above treatments are ineffective, surgical treatment can be chosen. For this disease, try to avoid the triggering factors related to this disease, and receive regular treatment during the active period, which can reduce the appearance of symptoms.