One week without bowel movement is considered to be constipation, intestinal obstruction, colon cancer, etc., should improve the examination, clarify the cause of the disease, and carry out symptomatic treatment under the guidance of the doctor. 1. Constipation: It mainly manifests as reduced frequency of defecation and dry and hard feces. The treatment mainly focuses on changing life habits, including the adjustment of dietary structure, the establishment of correct defecation habits, and the adjustment of mental and psychological state. Medications include laxatives, pro-dynamic drugs, pro-secretory drugs, enemas, suppositories, etc. If the symptoms are not relieved and the quality of life of the patients is seriously affected, surgery can be chosen. 2. Intestinal obstruction: Intestinal obstruction is an obstacle to the passage of intestinal contents caused by various reasons, commonly found in intestinal adhesions, tumors, intestinal inflammation, hernia, etc. Symptoms include abdominal pain, constipation, vomiting, and lack of defecation. The treatment is to correct the systemic physiological disorders caused by intestinal obstruction (e.g. water, electrolyte, acid-base balance disorders, etc.), in order to relieve intestinal obstruction. Drug treatment can choose potassium chloride injection, glucose injection, amino acid injection, broad-spectrum antibiotics and so on. Surgery can choose open surgery or laparoscopic surgery. 3. Colon cancer: Colon cancer can show symptoms of abdominal distension, abdominal pain, constipation or inability to defecate, which can be treated by radiotherapy or surgical resection, and the specific treatment plan should be decided by doctors according to the actual situation. If you fail to have bowel movement for a long time, it is recommended to go to the hospital for consultation to clarify the cause of the disease and take symptomatic treatment according to the doctor’s instruction to avoid adverse consequences.