Newborns who are not burped may spit up and choke, and in severe cases, aspiration pneumonia and abdominal pain may result. 1. spitting up, choking: because of the incomplete development of certain structures in the stomach of newborns, if you do not burp, it is easy to cause the milk that originally went into the stomach reflux to the esophagus, the milk may also enter the trachea, causing choking. 2. aspiration pneumonia, abdominal pain: if the newborn does not burp choking is serious, it will lead to a large amount of milk into the trachea to the lungs, but also may cause the newborn aspiration pneumonia and abdominal pain and other conditions. Therefore, if the newborn hiccups, should be timely and correct way to burp, burp can reduce the occurrence of choking spit milk or aspiration pneumonia.