Neonatal jaundice is categorized into physiological and pathological jaundice, of which physiological jaundice will not recur while pathological jaundice will recur after subsiding. Neonatal jaundice is caused by the accumulation of bilirubin in the body of the newborn, resulting in jaundice of other organs and skin, and is divided into physiological jaundice and pathological jaundice. Physiological jaundice in newborns can gradually subside in 5 to 9 days, not more than 2 weeks for full-term infants at the latest, while jaundice in preterm infants can be prolonged to 3 to 4 weeks. If the jaundice recurs, it should be considered as pathological jaundice, and its occurrence is related to diseases causing excessive bilirubin production (e.g., subcutaneous hematoma, ABO hemolytic disease), hepatic bilirubin metabolism disorders (e.g., oxygen deprivation, infectious or pharmacological factors), and bile excretion disorders (e.g., neonatal hepatitis, biliary atresia) etiological factors. If jaundice is found to recur in newborns or to appear as early as 24 hours after birth, it is important to seek prompt medical attention and follow the doctor’s instructions so as not to affect the newborn’s health as well as his or her growth and development.