It is normal for infants to have no bowel movement for a day occasionally, but if there is no bowel movement for many days or accompanied by other abnormal symptoms, it is abnormal and requires attention and prompt medical treatment. In general, breastfed infants have a slightly higher number of bowel movements per day, ranging from 1 to 4; artificially fed infants have 1 to 2 bowel movements per day or once every two days. Depending on the physical condition of the infant, it is normal for there to be differences in the frequency of daily bowel movements between individuals. When an infant occasionally does not have a bowel movement for a day, but sleeps normally, eats milk normally, the pre-stool is not dry and has no milk petals, the infant’s mental state is good, there is no violent crying, and there are no other abnormal discomforts, it is generally a normal phenomenon, parents need to pay attention to observation, and there is no need to be overly concerned. If the baby continued for three to five days without stool or the baby appeared to cry violently, it may be abnormal, parents are advised to take the baby to the hospital to determine the cause of the disease, timely targeted treatment, so as not to miss the opportunity for treatment.