If the newborn has more blood in the stool, the child’s general condition is poor, there is a refusal to breastfeed, poor response, etc., you need to consult a doctor in time. If there is blood on the surface of the stool, the most common cause is anal fissure. If there is blood mixed in the middle of the stool, the common causes are infection, allergy and bleeding disorder. If there is an infection, there will be an increase in white blood cells on routine stool examination, and anti-infection treatment is needed. Blood in the stool caused by allergy is especially seen in formula-fed newborns. There are also hemorrhagic diseases that can cause blood in the stool, mostly in breastfed newborns, because of the lack of vitamin K in breast milk, which needs to be supplemented in a timely manner.