Pink blood in the stool suggests the presence of rectal disease, considering rectal polyps, ulcerative colitis, hemorrhoids or anal fissure. 1. Rectal polyps: there will be blood in the stool, usually the blood flow is not large, the color is not red enough, and can be attached to the surface of the stool. The current treatment for rectal polyps is endoscopic resection. If it is a single polyp with a small diameter, it can be removed; if it is multiple, samples need to be taken for pathologic examination before making a decision. 2. Ulcerative colitis: a chronic non-specific intestinal inflammatory disease of unknown cause, mostly due to damage to the colonic mucosa, shedding, bleeding, etc., there will be mucus, pus and blood stools, mainly through the clinical symptoms, endoscopy and pathology and histology for a clear diagnosis. 3. Hemorrhoids or anal fissure: Hemorrhoids or anal fissure caused by constipation is the most common cause of blood in stool. Usually accompanied by perianal heat and pain, fidgety, can use hemorrhoid pessary or hemorrhoid cream for clinical symptoms of relief treatment, if necessary, surgical treatment. If there is pink blood in the stool, it is recommended that the patient go to the hospital for examination to clarify the cause of the disease and then actively treat it, so as not to delay the condition.