Newborns can start taking probiotics after birth. If the newborn is in the case of illness, it is necessary to use probiotics under the guidance of a physician. The intestinal flora is gradually established after birth and the intestinal function is not yet mature. Taking probiotics can promote the establishment of intestinal flora, and it helps the establishment of intestinal digestive function, so newborns can start taking probiotics after birth. However, probiotics also have certain adverse drug reactions, so in general, newborns do not have any discomfort symptoms, should not routinely take probiotics. Probiotics are mainly to regulate intestinal flora, promote digestion and absorption, so when the newborn exists constipation, symptomatic diarrhea, as well as jaundice, you can use probiotics under the guidance of the physician, which will help the recovery of the disease. During the use of probiotics, pay attention to observe whether there are adverse drug reactions, such as gastrointestinal symptoms worsening, etc., if necessary, suspend taking.