Bleeding after defecation can hang up the anorectology, gastroenterology, general surgery and other departments. 1. Anorectology: If the patient shows blood or dripping blood during stool without pain, or when there is pain in defecation and foreign body prolapse from anus in severe cases, it may be hemorrhoids, and need to go to anorectology. If it is dripping blood after stool, and there is regular localized pain in the perianal area and symptoms of constipation, it may be anal fissure, it is also recommended to hang up the anorectal department. 2. Gastroenterology: if the patient’s bleeding shows tarry or black stools, it may be peptic ulcer; if it shows pus and blood stools, accompanied by urgency, constipation, diarrhea, stool thinning, etc., it may be rectal cancer. In these cases, it is recommended to hang up the gastroenterology department. 3. General Surgery: If the patient has long-term symptoms of blood in stool, accompanied by symptoms such as loss of appetite, obvious loss of weight, fatigue, etc., which is suspected to be caused by tumor, the patient can hang up the General Surgery Department. Patients are advised to seek medical treatment in time, if they don’t know which department to consult, they can consult the guide doctor of the hospital.