Neonatal jaundice is one of the most common conditions in newborns, especially in early-born infants. If a baby has jaundice, it is important to determine whether it is physiological or pathological jaundice. If it is physiological, the jaundice will not appear too early or be too severe, and will gradually subside on its own within a certain period, typically without recurrence. If the jaundice decreases or has already subsided and then reoccurs, be vigilant for pathological jaundice. The causes of pathological jaundice are numerous and depend on the increase in bilirubin. If direct bilirubin is elevated, liver and biliary diseases should be suspected. If indirect bilirubin is elevated, it may indicate pathological factors causing destruction of red blood cells, leading to an increase in jaundice. Therefore, if there is recurring jaundice, it is advisable to seek timely medical attention at the hospital.