If the newborn has blood in the stool, the following causes are mainly considered: 1, bacterial enteritis, the child in addition to blood in the stool, often there will be mucus in the stool, and even pus and blood. For this situation, parents can give their children routine stool tests, if the stool has red blood cells, pus cells, or stool culture has dysentery bacillus, E. coli, considered to be caused by bacterial enteritis, need to give the child timely application of cephalosporin anti-infective treatment. After the infection is controlled, the situation of blood in the stool will subside. 2, milk protein allergy, common in infants and children using formula feeding time. As children are allergic to formula, thus appearing with blood in the stool, the child often also has eczema and other allergic manifestations. Parents only need to switch their children to deeply hydrolyzed protein milk powder or amino acid milk powder, the child’s blood in the stool will also disappear.