Blood in stool mainly refers to bleeding in the small and large intestine caused by various reasons. According to the amount of bleeding can be divided into: 1, occult blood: a little gastrointestinal bleeding, the naked eye can not see or can not distinguish whether it is blood in the stool, need to be determined by laboratory tests. 2.Small amount of blood in the stool: only a small amount of bloody stool from the anus, or a small amount of bloody stool stained with underwear. Large amount of blood in stool: large amount of blood in stool within a short period of time, bleeding more than 15% to 25% of total blood volume in 24 hours. According to the bleeding color can be divided into: 1, fresh blood stool: color bright red most of the close to the anus area bleeding and acute bleeding. 2, old blood stool: dark red color mixed with blood clots, mostly for the distance from the anus farther parts of the intestinal bleeding. 3, jam-like blood stool: dark red color mixed with mucus, is typical of pediatric acute intussusception blood stool. 4, black stool: also known as tar-like stool, for the small intestine or stomach of slow bleeding. According to the cause of bleeding can be divided into: 1, systemic diseases: such as bleeding disorders, infections, anaphylactic purpura, vitamin K deficiency, certain drugs. 2, the intestinal tract itself: small intestine: acute intussusception, intestinal obstruction, intestinal malformation, etc.; large intestine: intestinal polyps, ulcerative colitis, tumors, etc.; anus: anal fissure, internal and external hemorrhoids, perianal vascular slips and so on. Parents how to deal with blood in stool: 1, to determine whether the blood in stool is really, to exclude the red material in the stool may be caused by the food with pigment, such as watermelon, tomatoes, certain drugs. 2, determine the nature and amount of blood in stool, if a large amount of blood in stool appears in a short period of time, it is acute gastrointestinal hemorrhage, and should be sent to the hospital urgently for rescue treatment. Pay attention to the symptoms of blood in stool, if it belongs to systemic diseases such as blood disease bleeding, often have other parts of the bleeding, such as gums, joints and skin bleeding, etc., may also have the usual peripheral bleeding or joint hematoma, etc.; anal fissure with blood in the stool, for the stool sticking with a small amount of blood, or after the anal drip blood, accompanied by pain in defecation, most of them have a history of constipation, usually can be cured after conservative treatment; if it is colon polyp, mostly manifested as painless, painless and painful, and the blood in stool is not enough. Polyps, mostly manifested as painless bloody stool, careful parents can find that there are scratches on the stool or deformation of the stool; suspected intestinal polyps should be done colonoscopy, which can not only find the polyps and their locations, but also remove the polyps; such as the occurrence of acute intestinal intussusception, in the presence of jam-like stools at the same time can be accompanied by paroxysms of crying and vomiting, such a situation is very critical, it is necessary to go to the hospital as early as possible, or else, once delayed, will be Otherwise, if the treatment is delayed, intestinal necrosis will occur, and even death by shock. Parents should not panic after the appearance of bloody stools, in addition to the above precautions, we should keep the bloody stools and go to the hospital together with the child, so that the doctor can determine the nature of the blood and stools and do the relevant laboratory tests in a timely manner. If there is a large amount of blood in the stool, accompanied by shock manifestations such as pallor, weak and rapid pulse, confusion or agitation, emergency vehicles and ambulance personnel should be called for help.