Children with blood in stool, consider acute enteritis, anal fissure, intussusception and so on. 1. Acute enteritis: when the child is infected by Escherichia coli, Staphylococcus aureus and other infections, there is a possibility of mucous hematochezia, which results in blood in the stool. 2. Anal fissure: if prolonged constipation, dry stool repeatedly stimulate the perianal mucosa, forming anal fissure, there will be bleeding or wiping with blood every time of defecation, even with severe pain. 3. Intussusception: If the stool is bloody mucus, or jam-like stool, and accompanied by abdominal pain, abdominal mass, need to consider intussusception. Children with blood in the stool, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, give targeted treatment or treatment.