Newborn jaundice 15.7mg/dl how many days of blue light, generally need to be based on the newborn’s late recovery to decide, if their own recovery is faster generally in a week or so, if the recovery is slower, it will take half a month, or even more time. Most newborns will have jaundice after birth, if the jaundice reaches 15.7mg/dl or so, they need to be treated with blue light, if the newborn recovers faster, generally about a week after irradiation can be discharged; on the other hand, slower recovery will take half a month, or even longer. Newborns in the blue light period, pay attention to more milk, more stool, can promote the body’s bilirubin discharge, in addition to the hospital also need more sunshine.