Generally, neonatal jaundice will subside in about 2 weeks for full-term infants, and in preterm infants, the jaundice will gradually subside within 4 weeks after birth. Full-term jaundice has not yet subsided, indicating that it is a case of pathological jaundice. In this case, the cause of the delayed jaundice should be clarified. The more common causes are due to abnormal liver function or breast milk jaundice, and other rare causes such as genetic metabolic disease or abnormal activity of congenital enzymes involved in bilirubin metabolism. If the jaundice does not subside in a full-term baby, you should first check the liver function to see if there are any problems, and also to see if the direct bilirubin is elevated or indirect bilirubin is elevated, if the direct bilirubin is elevated, it is often due to a problem with the development of the bile duct or an abnormal liver function due to intrauterine viral infection, and you need to actively seek medical advice to clarify the cause. If the elevated indirect bilirubin is mainly due to intrauterine viral infection, breast milk jaundice, genetic metabolic diseases, etc., it is also necessary to identify the cause. For breast milk jaundice generally jaundice value is not too high, does not affect the baby’s growth and development, does not affect the mental state and milk eating, generally according to the baby’s jaundice value to decide whether to suspend breastfeeding, can give the baby more sunshine to help jaundice subsided. There are many causes of pathological jaundice in newborns, so it is important to identify the cause and take different treatment measures according to the cause.