21 months baby burping and farting is generally due to improper eating, cold abdomen and other causes of indigestion. 1. Improper eating: The reason why babies burp and fart a lot is mainly due to the accumulation of a large amount of gas in the gastrointestinal tract within a short period of time and can not be discharged. So if your baby eats food that is not easy to digest or eats too much food at one time, he or she will experience indigestion symptoms such as burping and farting. 2. Cold abdomen: The gastrointestinal function of babies is not fully developed, so the digestive function is not perfect, when the abdomen is cold, it is easy to burp and fart and other symptoms of indigestion. It is recommended that parents pay attention to the baby’s abdomen to keep warm. 21 months baby hiccups and farts may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.