An infant who does not have a bowel movement for two days but only farts may have functional constipation caused by a more homogeneous diet and insufficient gastric power, or it may be caused by a congenital megacolon. Functional constipation can be improved by increasing water intake, massage, and the use of medications. Congenital megacolon requires prompt medical attention for conservative treatment or surgery. Functional constipation: infants with slow gastrointestinal peristalsis, if improper diet can appear not stool only fart situation, these operations can be carried out: 1, increase the amount of water: if the amount of water is not enough, it will lead to dry stools, difficult to discharge. You can increase the amount of water according to the child’s age, you can also properly let the child eat fruits with high water content, such as pears, apples, etc., it is recommended to use the supplement machine juice after consumption; 2, massage: the gastrointestinal function of infants is not fully developed, poor digestive function, parents can gently clockwise to the baby abdominal massage to promote digestion, you can also use the appropriate temperature of hot water bags for hot compresses; 3, the use of drugs: such as Constipation symptoms are more serious, you can give the child probiotics under the guidance of a doctor to improve intestinal symptoms. If you still can not defecate with abdominal pain, bloating obvious use of corked laxative for laxative. Second, congenital megacolon: infants can appear stubborn constipation, there will be no stool, only farting situation, need to promptly seek medical advice, for the temporary inability to carry out surgery, can first conservative treatment, such as enemas, the application of lactulose and other drugs to induce diarrhea, in line with the indications for surgery should be timely surgical treatment.