Bowel disorder can be caused by benign diseases or malignant diseases, so bowel disorder is not necessarily bowel cancer, but bowel cancer will be accompanied with symptoms of bowel disorder. The benign diseases of intestinal disorders, such as intestinal flatulence, are only functional changes, or intestinal irritation, which is mostly caused by the stimulation of intestinal mucosa by spicy food. Constipation, because the stool sticks to the colon for a long time, resulting in a large amount of water absorption, dry and constipated stool, which will unite with the intestinal mucosa and stimulate the intestinal mucosa causing intestinal spasmodic pain. Patients with intestinal disorders can track their life diary and make adjustments through their living habits, eating habits and emotions. For bowel disorders occurring in bowel cancer, anti-tumor therapy and symptomatic treatment will be given according to the lesions and comorbidities. For patients with constipation, especially caused by non-malignant tumors, it is recommended to adjust diet, consume coarse fiber food and develop the habit of regular bowel movement, so that the feces in the intestinal cavity will not accumulate continuously after defecation and toxins will not be absorbed, which can reduce the occurrence of intestinal cancer.