It is recommended to burp immediately after drinking milk because babies tend to swallow air when they drink milk, and if they are not burped in time, they will easily spit up. The muscles at the cardia of the infant’s stomach are loose and the muscles at the pylorus are tense, so it is easy to swallow air into the stomach when drinking milk, and the infant’s stomach is horizontal, so if the swallowed air is not expelled in time, it is easy to spit up. Spitting up may lead to choking, aspiration and even aspiration pneumonia, so it is recommended to burp immediately after drinking milk. Burp method is very simple, the baby’s head against the mother’s shoulder, the mother with a hollow palm gently pat the baby’s back until the hiccups out, sometimes there is no hiccups, it may be that the baby is drinking milk in the correct position, and did not swallow the air.