Generally, the causes of nausea and vomiting in newborns include the following: firstly, it is caused by excessive milk intake, if the amount of milk drunk by the newborn exceeds the burden of the stomach, it will cause nausea and vomiting, and the abdomen of the newborn is often very distended. In this case, it is necessary to reduce the amount of milk fed to the newborn and massage the newborn’s abdomen clockwise. If the newborn is infected with bacteria or viruses, the pathogenic bacteria will invade the newborn’s throat and cause inflammation of the throat, which will lead to nausea and vomiting. For this situation, you can give the newborn appropriate warm water, clear bacterial inflammation can be applied cephalosporin antibiotics treatment.