Newborn jaundice after taking blue light rebound is considered to be the irradiation time is not long, at the same time may also be related to other diseases. 1. The irradiation time is not long, if the irradiation time is relatively short when taking the blue light, the newborn’s physical condition has not been completely controlled, the bilirubin destruction speed is faster, the rebound situation may occur. 2. other diseases, newborn jaundice after taking blue light rebound may also be related to other factors, such as the emergence of hemolytic disease, infant hepatitis syndrome and other problems may also affect the body metabolism, the emergence of this symptom. Newborn jaundice after blue light rebound may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.