Baby old fart may be related to physiological factors, indigestion, acute enteritis, etc., the specific analysis is as follows: 1. Physiological factors: babies suffer from hunger, oversatiety and other physiological factors can cause intestinal peristalsis faster, farting more. 2. indigestion: babies eat too much milk or food, the baby’s digestive function is not very sound, food in the intestinal tract for a long time will be fermented to produce gas, resulting in the phenomenon of old farts. 3. Acute enteritis: when the baby is infected with bacteria or virus, more gas will be produced in the intestines, and the gas will become more, resulting in the phenomenon of baby farting all the time. The baby old fart may also be related to other reasons, it is recommended to go to the hospital in time for relevant examinations, to clarify the cause of the symptomatic treatment.