It may be normal for a forty-day-old baby to go two days without a bowel movement. If there are symptoms such as crying and restlessness, abdominal distension and poor spirit, it is not normal. Forty days of the baby’s body organ development is not perfect, this time the gastrointestinal tract function is not sound, easy to lead to two days without defecation, if the baby’s mental state is normal, then it is generally a normal physiological phenomenon, you can massage the baby’s abdomen appropriately to help promote gastrointestinal peristalsis, thus helping the baby defecate. If the forty-day-old baby two days without defecation, accompanied by crying, bloating, poor spirit and other symptoms, then it may be intestinal dysfunction, constipation, intestinal obstruction and other causes, is not normal, need to go to the hospital in time for examination and treatment, to avoid affecting the baby’s development. Forty days baby age is small, in the feeding advice to pay attention to avoid affecting the baby’s development, if breastfeeding, it is recommended that the mother to avoid eating spicy and stimulating food, if it is formula feeding, it is recommended to follow the instructions to the correct proportion, so as to avoid causing constipation of the baby.