Jaundice value below 12.9mg/dl on the fourth day of life is considered normal, and jaundice value above 12.9mg/dl is considered too high. Newborns usually start to appear jaundice in 2 to 3 days after birth, 4 to 5 days is the peak of jaundice, jaundice value is not more than 12.9mg/dl are normal, generally do not need to carry out special treatment, you can give newborns to drink more water, to promote the excretion of bilirubin metabolism and discharged, jaundice will gradually subside in 5 to 7 days or so, usually no more than two weeks. However, if the jaundice value of the newborn is higher than 12.9mg/dl, or even more than 15mg/dl, the jaundice value is too high, and it is necessary to improve the relevant examination to clarify the cause of jaundice, and give targeted treatment. Due to the different ages of newborns, it is recommended to monitor the jaundice index dynamically on a daily basis, so that any abnormality can be treated in a timely manner.