Relying only on the jaundice value of 12mg/dl on the second day of the newborn’s life cannot determine the severity. Generally, the skin will appear more obvious yellow staining, which may be physiologic or pathologic, and the newborn’s condition should be continuously monitored. 1. Physiologic jaundice: Generally, jaundice visible to the naked eye can occur when the serum bilirubin of the newborn exceeds 5-7mg/dl. Physiologic jaundice can be seen in some full-term babies, but it is usually in good condition and can subside in 1~2 weeks. 2. Pathological jaundice: Jaundice appears within 24 hours after birth; it lasts for a long time; it is more than 4 weeks in preterm infants and more than 2 weeks in term infants; jaundice recurs after it recedes; bilirubin rises by more than 5mg/dl per day or more than 0.5mg/dl per hour, etc. If the above situations occur, it may be pathological jaundice and requires treatment. When the bilirubin value is obviously abnormal, it is necessary to actively consult the doctor and follow the doctor’s instructions for reasonable treatment.