Bleeding in the stool but blood and stool separate usually due to anal fissure, rectal polyps, internal hemorrhoids. 1. Anal fissure: generally due to long-term constipation caused by the patient’s stool dry, thus forming anal fissure, usually itching, constipation, bleeding and other symptoms. Because it occurs in the anal canal, so after the bleeding is not coagulated to be discharged there will be blood in the stool to separate the phenomenon. 2. Rectal polyp: rectal polyp is a kind of rectal mucosa surface elevated lesion, usually due to heredity, bad habits and so on, such as long-term smoking, poor diet can lead to rectal polyp, usually blood in the stool, abdominal distension, anemia and other symptoms. 3. Internal hemorrhoids: bleeding in the stool but blood and stool separate usually caused by internal hemorrhoids, usually due to long-term constipation caused by the patient’s internal hemorrhoids, there may be painless blood in the stool, anal swelling, hemorrhoidal prolapse, and other symptoms, usually more pronounced after the stool. It is recommended that patients usually pay attention to maintain anal hygiene, often with warm water sitz bath to prevent anal diseases, while timely to the hospital for examination, under the guidance of the doctor for treatment.