If jaundice recurs in a newborn, it is mainly due to the following conditions: first, due to secondary infection in the newborn. This is because normal jaundice in newborns will completely and slowly subside within 2-4 weeks after birth. If it recurs, it is often due to infection with various pathogenic bacteria. For example, when a newborn is infected with bacteria, the bacteria will invade into the newborn’s bloodstream, thus causing sepsis. When sepsis occurs in a newborn, it can cause jaundice as well as symptoms such as a poor mental state and a tendency to want to sleep. To deal with this situation, newborns should be given timely anti-infection treatment. Secondly, it is caused by biliary atresia jaundice. Because the jaundice of newborns may belong to physiological jaundice at the beginning, the symptoms of jaundice caused by biliary atresia have not been shown. As time passes, the newborn’s jaundice will gradually worsen and the stools tend to be clay-like. In this case, the newborn should be given prompt surgical treatment.