The most common causes of blood in the stool of newborns are intestinal allergies, intestinal infections, and neonatal hemorrhagic disease. If it is caused by infection, first of all, you need to improve the stool routine examination, stool routine results will show leukocytosis, in this case you need to take oral antibiotic treatment, the symptoms are more serious need to apply antibiotics intravenously, and then review the stool routine again after treatment. If it is caused by intestinal allergy, it is recommended to change partially hydrolyzed protein formula. If it is caused by neonatal hemorrhagic disease, there are no white blood cells in the stool routine examination, there will be erythrocytosis and positive occult blood, and it is necessary to improve further examination to clarify the cause of bleeding. As long as the newborn has blood in the stool, it is necessary to consult a doctor to determine the specific cause.