Blood dripping from the stool can not be immediately sure whether it is hemorrhoids or intestinal cancer, it is necessary to further clarify the diagnosis based on different clinical symptoms and related auxiliary examinations. 1. The color of blood in stool: the color of blood in stool of hemorrhoids is bright red, which is usually separated from stool and exists independently on the surface of stool. On the other hand, the color of blood in the stool of intestinal cancer is dark red, and the blood is fused together with the stool. 2. Accompanying Symptoms: Hemorrhoids after the appearance of blood in the stool is accompanied by symptoms mainly in the local anal symptoms, such as pain in the anal orifice, the prolapse of the anal mass or constipation. The accompanying symptoms of intestinal malignant tumors are mainly abdominal pain, changes in bowel habits, and generalized emaciation, fatigue and anemia. 3. Auxiliary examination: when the patient is bleeding due to hemorrhoids, generally through the anoscopy can clearly see the local hemorrhoid core bleeding and have obvious bleeding points. And intestinal cancer bleeding need to further electronic colonoscopy, if necessary, need to be combined with pathology biopsy. In addition to hemorrhoids and tumors, blood dripping from the stool may also be proctitis, rectal polyps and other causes, should be under the guidance of the doctor for systematic examination and treatment.