Jaundice can occur in newborns after birth, and some of the jaundice is physiological, which is related to the incompetence of the liver in children. The incompetence of the liver is weak in the conversion and excretion of bilirubin, and transient jaundice can occur, which is called physiological jaundice. If the level of jaundice is high and lasts for a long time, it is called pathological jaundice and needs to be treated promptly with oral anti-yellowing medications and blue light irradiation if necessary. There are other factors that can cause elevated jaundice in children, such as infections. Common viral infections can cause damage to the liver and cause the onset of jaundice. In addition, imaging tests, such as abdominal ultrasound, should be performed to rule out congenital causes of elevated bilirubin, and treatment should be given according to each case.