Toilet pull bleeding causes and diseases are many, common are the following diseases: First, anal fissure, bleeding when stool, characterized by painless, bright red blood, appearing when stool, the amount of bleeding is generally not large, often for the post-stool anal wipe blood with anal pain, often with severe constipation. Second, hemorrhoids blood in stool, blood color bright red, rubbing blood drops of blood or jet-like bleeding, bleeding amount is not certain, sometimes there is an anal mass prolapse, if the prolapse of necrosis, then the anal pain is obvious, less often accompanied by a change in bowel habits. Thirdly, colorectal polyps, blood in the stool is bright red or dark red, or only fecal occult blood, positive test, the amount of bleeding is generally not much, the polyp is soft, enteroscopy can be clearly visible. No matter which cause of bleeding in the stool, usually to develop good eating habits, do not eat spicy stimulating food, and actively treat the primary disease.