Overview: The symptoms of physiological jaundice and pathological jaundice in newborns are different. Physiological jaundice 1, newborn blood bilirubin content of more than 5mg / dl is neonatal jaundice; 2, physiological jaundice 2-3 days after birth, 7-10 days to subside; 3, manifested as light yellow skin, or yellow in red. The face begins, slowly spread to the trunk, limbs yellow; 4, eating milk and good mental condition. Pathological jaundice 1, jaundice appears early, 24 hours after birth; 2, serum bilirubin can exceed the normal value, more than 225μmol/L; 3, the order of its yellowing is from the face to the chest, and then to the trunk and limbs, and in severe cases, the palms of the hands and feet are yellow. In addition, some patients will also have yellowing of the eyes, which is medically known as scleral yellowing; 4. Some children with persistent jaundice do not subside, and the jaundice may even worsen, even for a month; 5. In children with pathological jaundice, serious complications can occur, such as nuclear jaundice, which is bilirubin encephalopathy; 6. When nuclear jaundice occurs, the child’s jaundice will significantly worsen, and When jaundice occurs, the child’s jaundice may increase significantly, manifesting as drowsiness, lack of strength to suckle, or choking, or changes in muscle tone; 7. In severe cases, the child may moan, scream, or even convulse, and develop serious symptoms such as respiratory failure. The rapid change of the disease can easily lead to death. Even if the symptoms can be relieved with treatment, some children can develop brain or intellectual damage, appearing as mental retardation or cerebral palsy and other sequelae.