8 months baby can not pull out may be due to dietary deficiencies caused by the need to increase the amount of feeding; may also be due to constipation, can be improved through the life of dietary adjustments, massage and abdominal rubbing, medication. 1. Insufficient diet: when infants eat too little, liquid absorption after digestion, less residue to reduce stool, thickening. Insufficient sugar in the milk when the intestinal peristalsis is weak, can make the stool dry, can lead to the baby can not be defecated, can increase the amount of food, eat more fruits and vegetables. Artificial feeding should reduce the amount of cow’s milk or increase the amount of sugar in milk 8% to 10% larger children’s diet to increase the intake of beans and soy products. 2. constipation: is a common reason why babies can not poop, at this time you can give the baby more dietary fiber containing more vegetables and fruits, such as leeks, celery, bananas, pears, etc.; can also be used under the guidance of a doctor Keserol lubrication of the intestinal tract, soften stools, oral bifidobacteria, bacillus subtilis bifidus, probiotics such as bifidobacteria to regulate the intestinal flora; and defecation training in order to improve the situation of defecation. All of the above drugs need to be used under the guidance of a doctor, constipation self-medication. If your baby is unable to poop, it is recommended to consult a doctor in time to be evaluated by a specialist for treatment or therapy.