It may or may not be normal for an 8-month-old baby to have a bowel movement once every 3 days, depending on the color and character of the baby’s stool, and whether it is difficult to pass stools, etc. to make a comprehensive judgment. It is reasonable for 8-month-old babies to have 1 to 2 bowel movements per day. If the occasional 3 days a stool and stool color, good character, defecation is not difficult, also belong to the normal phenomenon. Because at this time the baby’s intestinal tract is in the process of development, sometimes eat not much food, food residue is relatively reduced, it is possible to 3 days a stool, can be appropriate to the baby to increase the amount of food. If the baby frequently appears 3 days a stool symptoms, that baby has indigestion, belong to the abnormal situation. If the stool is darker in color, harder in nature and more difficult to pass, constipation may have occurred. Appropriate measures can be taken to increase the baby’s intake of dietary fiber, increase activity, and develop good bowel habits. When the situation of 8-month-old babies having bowel movement once every 3 days continues to be unrelieved, it is recommended to consult a doctor in time for reasonable treatment.