Blood in the stool should be examined as soon as possible People will always have blood in the stool throughout their lives, some more often, some less often, and most people think it’s nothing and rarely pay attention to it, let alone go to the hospital for examination. The most common causes of blood in the stool are twofold: ① digestive tract: hemorrhoids, anal fissures, tumors, anal fistulas, inflammatory bleeding and skin mucosal injuries. In addition parasites, intestinal ulcers, typhoid, paratyphoid, intestinal vascular disease, etc. ② Systemic aspects: acute infectious diseases (such as epidemic hemorrhagic fever, leptospirosis), platelet abnormalities, coagulation dysfunction, systemic vascular lesions and lupus erythematosus, uremia, etc. Although most of the blood in the stool is caused by the digestive tract, it is better to go to the hospital for examination as soon as possible in order to find out the cause of bleeding and get early and effective treatment.