There is no fastest solution for constipation in infants. The baby constipation can’t come out is mostly related to improper diet, can adjust the diet, use bifidobacteria, lactulose and other medication. 1. Adjust the diet: infants due to the imperfect development of the digestive system, when the intake of food is too much, fiber and water intake is insufficient, can lead to constipation, parents should reduce the high-fat, high-protein food, supplemental food to increase the content of dietary fiber, such as sweet potatoes, pumpkin, vegetable juices, juices, etc., and at the same time to drink more water. 2. Medication: Probiotics, such as Bifidobacterium bifidum and Bacillus subtilis, can be used to regulate the intestinal flora and help digestion; lactulose can also be used to stimulate gastrointestinal peristalsis and relieve constipation. If necessary, corkscrew can be used to relieve symptoms. Infant constipation is recommended to consult a doctor in time. All of the above medications should be used under the guidance of a physician, and should not be used on their own.