Newborn babies’ diarrhea may be caused by physiological phenomenon, lactose intolerance, acute gastroenteritis and other reasons. 1. Physiological phenomenon: Breast milk has a higher content of clear protein, prostaglandins, etc., and infants who are mainly breastfed will have more frequent stools. Stools are usually golden yellow and dilute, which is a normal phenomenon. As the baby grows, the function of the digestive system gradually improves, and the number and shape of stools will gradually improve, so there is no need for special treatment. 2. Lactose intolerance: Infants lack lactase enzyme in their intestines, which prevents them from digesting the lactase enzyme in milk well, resulting in loose stools. Lactase can be used under doctor’s supervision. 3. Acute gastroenteritis: infants will appear diarrhea, abdominal pain, fever and other abnormal symptoms, need to carry out stool tests to confirm the diagnosis of the disease, bacterial infections can be under the guidance of the doctor to use antibiotics such as cefixime treatment. Parents need to pay attention to the cleanliness of the baby’s buttocks when the baby has diarrhea. Wash the buttocks with lukewarm water and change diapers often to avoid redness of the baby’s skin. Pathological causes of infantile diarrhea, it is recommended to consult a doctor as soon as possible, under the guidance of the doctor for treatment. The above medication should be used in accordance with the doctor’s prescription.