Hiccups in newborns are caused by imperfect development of the nervous and digestive systems or other objective factors that cause the vocal folds to close involuntarily after drinking milk. 1. Incomplete development of the digestive function of newborns, the combination of the esophagus and the stomach is flaccid, and the pylorus of the stomach is narrower at the same time, which can cause hiccups after eating milk. 2. Incomplete development of the nervous system of newborns, the diaphragm muscle is strongly contracted after the stimulation of breastfeeding, which causes hiccups. 3. Incorrect breastfeeding posture of family members, too fast and too fast breastfeeding or cold milk can cause hiccups after breastfeeding. In short, family members need to pay more attention to the above aspects of feeding, you can gently pat the newborn’s back or take warm water to reduce the hiccups time, and if necessary, consult a doctor.