Breastfed babies normally have about 2~4 bowel movements per day, 4 days without bowel movement is generally considered abnormal, constipation exists and intervention is needed. For breastfed babies, the general number of stools is slightly more, about 2 to 4 times a day, regular bowel movements, no sudden increase in the number of times a day to relieve the phenomenon, some babies can be up to 4 to 7 times, such babies have normal growth and development, weight gain is good, as a normal phenomenon. For this type of 4 days without stool, generally believe that the interval between defecation significantly prolonged, the existence of constipation, for abnormal, most of the functional constipation, some babies can therefore appear abdominal discomfort, easy to cry performance, the need to use the Kesler and other discretionary intervention. Some babies can be due to congenital megacolon constipation, serious intestinal obstruction, etc., need to actively seek medical attention, if necessary, surgical treatment. Breastfed babies who have not had a bowel movement for 4 days are advised to seek medical attention and be evaluated by a specialist.