When constipation bleeding need to perform anal fingerprinting, abdominal examination, enteroscopy and so on. 1. Anal diagnosis: through palpation, we can check the size of the anus, whether there is any foreign body in the anus and the contraction function of the anal sphincter. 2. Abdominal examination: through abdominal palpation, we can know the degree of tension of abdominal muscle, whether there is pressure and pain, liver and spleen enlargement, abdominal mass and ascites. Abdominal CT examination can clearly determine the inflammation and tumor in the abdomen. 3. Enteroscopy: Electronic enteroscopy can be carried out through a flexible tube with a camera that enters from the anal opening position to observe the intestinal mucosa and observe whether there are inflammatory diseases, ulcerative colorectitis, polyps and tumors in the intestinal tract. Constipation bleeding patients should go to the regular hospital in time, under the guidance of the doctor to carry out the appropriate examination, to clarify the cause of the disease and then targeted treatment.