The normal value of jaundice neonatal index is 15mg/dl in preterm infants and 12mg/dl in term infants, which is the normal value of general physiological jaundice. How to determine whether it is pathological jaundice, in addition to not more than 12mg/dl and 15mg/dl, but also pay attention to whether there are the following characteristics: first, the appearance of particularly early, within a day of birth jaundice; second, is not receding very late, more than 2-3 weeks has not yet receded; third, each day jaundice is not increasing too rapidly, more than 5mg/dl. so jaundice in Whether the neonatal index is normal, must go to refer to these four indicators: normal value, the daily increase in mg/dL (5mg/dl), very slow receding (2-3 weeks), and the last point there is receding and reappearing, that is, the jaundice is found to have receded, and then reappear, these symptoms belong to pathological jaundice. There are many causes of pathological jaundice, so it is very prudent to go to the hospital as soon as an abnormality is detected.