Ulcerative colitis is a non-specific, diffuse inflammatory disease of the large intestine of unknown origin. The WHO Medical Council has named this disease as idiopathic colitis and proctitis, also known as idiopathic ulcerative colitis. In Chinese medicine, this disease belongs to the category of intestinal fetishes, diarrhea in the large intestine, and resting dysentery. The onset of the disease is usually seen in young people. The main clinical manifestation of diarrhea is several times a day to more than 10 times a day, which can be bloody stool, mucus-blood stool, pus-blood stool, and sometimes patients can excrete a large amount of toothpaste-like material containing necrotic mucosa, infiltrated inflammatory cells and a little mucus, with a little blood on the surface. Some patients show no bleeding from the lower gastrointestinal tract, and the amount of bleeding can be up to 2000 ml at a time. abdominal pain is vague in mild cases and colic in typical cases, often located in the left lower abdomen and subumbilical abdomen, with the characteristics of abdominal pain – stool – relief. Individuals have constipation without diarrhea, and the feeling of urgency is the result of rectal involvement. Other GI symptoms include abdominal distention, nausea, vomiting, and reduction of nasal discharge. In severe cases, abdominal pressure, rebound pain, and muscle guarding may be present, and in some cases, spastic sigmoid or descending colon may be palpable. Systemic manifestations are mostly seen as weakness and wasting. In addition to fever in the acute stage, it is often accompanied by manifestations of skin, mucous membrane, joints, liver, kidney, eyes, mouth and other systems. Zhang Shuangxi, The First Affiliated Hospital of Henan College of Traditional Chinese Medicine, Anorectal Disease Treatment Center