How much is the normal value of jaundice on the fourth day of newborn?

Generally speaking, the serum bilirubin concentration of newborns born four days below 12.9 mg/dl belongs to the normal range, and the serum bilirubin concentration of premature infants should be below 15 mg/dl. If it exceeds the above range, it can be diagnosed as pathological jaundice, and blue light treatment should be carried out in time, or Yinzhihuang granules should be taken.