Phototherapy for jaundice can be irradiated for 12 hours or 24 hours a day. Its adverse effects include fever, diarrhea, bronchitis, etc. It is necessary to pay attention to protecting the eyes, monitoring bilirubin, and drinking plenty of water. 1. Time: When treating jaundice with phototherapy, it can be irradiated continuously or at intervals of 12 hours. 2.Adverse reactions (1) Rash, diarrhea, fever: generally not serious, can not stop phototherapy, or can recover by itself after stopping phototherapy. (2) Bronze: when serum bilirubin>68μmol/L, alkaline phosphatase and alanine aminotransferase increase, the skin can be bronze. At this time should immediately stop the light, bronze can subside by itself. 3.Precautions (1) When conducting light treatment, the infant should be given a black eye mask to protect the retina, and the anus and perineum should be covered, while the rest of the body should be bare. (2) Bilirubin levels should be constantly monitored during treatment, usually once every 6 to 12 hours. For >35-week neonates, phototherapy can be stopped when the serum total bilirubin <13～14mg/dl. (3) Appropriate hydration should be provided during phototherapy. Patients with jaundice should go to the hospital in time and standardize the treatment under the guidance of the doctor.