Neonatal jaundice is divided into physiological jaundice and pathological jaundice, which share the common symptom of yellowing of the baby’s skin, sclera and other parts of the body, but in some other aspects, the symptoms may be different. Physiological jaundice in newborns usually occurs 2-3 days after birth, with yellowing of the skin, white eyes and oral mucosa. The results of serum bilirubin tests are within the normal range, and the baby has no other uncomfortable symptoms, and it will subside on its own within 1-2 weeks and return to normal skin color. Pathological jaundice may occur within 24 hours of birth, and the jaundice may persist or reappear after it has subsided, or may become more severe, and the yellowing of the palms of the hands and feet may be particularly noticeable. If left untreated, it can cause symptoms of other diseases, such as nuclear jaundice, extravagant sleep, weakness in sucking or choking, hypotonia, and very serious symptoms such as moaning, screaming, convulsions and respiratory failure if not treated promptly, and can even cause death in newborns. Therefore, when the symptoms of jaundice appear in newborns, for safety reasons, it is best to take the baby to the hospital for a serum bilirubin test to rule out the possibility of pathological jaundice, and if it is diagnosed as pathological jaundice, then prompt treatment is needed.