When newborns are exposed to blue light, side effects such as fever, diarrhea and rash will mainly occur. Neonatal jaundice is one of the most common symptoms of the neonatal period, most neonatal jaundice is physiological jaundice, will generally subside on its own, no special treatment; but if the jaundice exceeds a certain range, considered pathological jaundice, you need to be hospitalized in a timely manner, blue light one of the anti-yellowing treatment measures, blue light is generally suitable for high unconjugated bilirubinemia, small day-old hemolytic patients or premature infants If the child’s direct bilirubin is elevated, phototherapy can make the skin appear blue-red. If the child’s direct bilirubin is elevated, phototherapy can cause the skin to appear cyanotic, i.e., bronchitis, and phototherapy should be stopped promptly, and bronchitis can usually subside on its own. Therefore, blue light for neonatal jaundice, prone to fever, diarrhea, rash and other side effects, is a relatively effective and safe way to improve jaundice.