Two and a half months of the baby a few days without defecation, parents can combine the baby’s milk, spirit, whether there are defecation difficulties, crying, etc. Judgement, if there is no other discomfort, is the performance of digestion and absorption ability to enhance the normal, if accompanied by other discomforts for constipation, intestinal obstruction. 1. digestion and absorption ability to enhance: the newborn baby stool more often, may be several times a day, with the increase in age, the baby digestion and absorption ability to enhance, two and a half months of the baby only milk, food residues, it may take a few days or even a week to form the stool, but the baby stool for yellow soft stool, milk and weight growth is stable, is a normal phenomenon. 2. Constipation: dry stools, difficult defecation, crying during defecation, blood in the stool are all signs of constipation, may also affect the baby’s milk supply, spirit, in addition, if persistent constipation, affecting the growth and development of the baby, but also need to be alert to the existence of food allergies. 3. intestinal obstruction: due to the imperfect development of the baby’s digestive system, easy to intestinal obstruction, obstruction manifested in the stopping of defecation, accompanied by increased crying, abdominal pain, abdominal distension, fever and so on. Two and a half months of the baby a few days without defecation, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.