Common causes are hemorrhoids, anal fissures, rectal polyps, anal foreign bodies, etc. can be caused. 1, children who are often dry, coarse stool, this time will lead to defecation difficulties, long-term past sometimes in the anal part of the foreign body feeling or itching, this time there will be bleeding, bleeding is mostly bright red, drip-like. There is usually no pain. 2, hemorrhoids can be divided into internal hemorrhoids, external hemorrhoids, mixed hemorrhoids. But mostly because internal hemorrhoids can cause blood in the stool. 3.Children within 2-3 years of age bleeding blood in the stool may be caused by intussusception. 4.Sometimes children who do not pay attention to damage the skin at the anus can also lead to blood in the stool. 5.Sometimes the mucous membrane of the small intestine is damaged by accidental ingestion of drugs or foreign bodies, and this may also lead to blood in the stool. 6, sometimes bacterial, viral infections can also lead to children with blood in the stool. 7, due to children’s unbalanced diet, often leading to constipation, this time there is also the case of fresh blood in the stool. 8, peptic ulcer, esophageal hiatus hernia, intestinal malformation can also lead to blood in the stool. Children with fresh blood in the stool need to go to the hospital in time for examination and diagnosis.