At present, three days after birth, newborns can generally take a bath, and the first bath is followed by the first vaccination, which is the hepatitis B vaccine and BCG vaccine. After vaccination, the injection site cannot be exposed to water, so bathing is required before vaccination. There is no strict limit to the frequency of bathing, it is done on a case-by-case basis. When taking a bath, pay attention to the ambient temperature and pay attention to the water temperature. The room temperature is usually controlled at about 28°C and the water temperature is usually about 40-45°C. Bathing time is recommended to be arranged for newborns about half an hour after feeding, the child is relatively quiet during this time. The bath lasts about 15-20 minutes, not more than half an hour, because the time is long, the newborn is more tired, easy to cry, and the child is easily irritable.