Jaundice of 20mg/dL is serious. If the baby is born prematurely, or has a low birth weight, or is less than 5 days old, the jaundice value is more serious for the baby; it is recommended that the baby should seek medical treatment in time, and under the guidance of the doctor, the cause of the jaundice value should be determined through examination, and targeted treatment should be carried out. If the child has a normal birth weight, is born at term, and the jaundice is not accompanied by fever, vomiting or other uncomfortable symptoms, it can be considered as normal neonatal jaundice; after the doctor has made a clear diagnosis, the jaundice can be relieved through the use of blue light and other means. It is recommended to consult a doctor to assess the severity of the jaundice and to provide appropriate treatment.