Jaundice can usually be divided into three categories: 1. Prehepatic jaundice/hemolytic jaundice: a jaundice condition that occurs when a large number of red blood cells are broken down. Hemolytic jaundice caused by increased red blood cell destruction and excessive bilirubin production. It is usually dominated by elevated indirect bilirubin and is accompanied by hemolytic anemia. 2, hepatogenic jaundice: jaundice that occurs when the liver is unable to process bilirubin properly. Hepatocellular jaundice is caused by hepatocellular lesions resulting in malfunction of bilirubin metabolism. Usually direct bilirubin and indirect bilirubin are elevated simultaneously, often accompanied by elevated transaminases. 3, post-hepatic jaundice: jaundice that occurs when the liver is unable to eliminate bilirubin normally. Mechanical obstruction of the intrahepatic or extrahepatic biliary system occurs, affecting the excretion of bilirubin and resulting in obstructive (obstructive) jaundice. It is usually dominated by elevated direct bilirubin with white stools. 4, in addition, there are certain congenital defects in the liver cells, can not complete the normal metabolism of bilirubin and the occurrence of congenital non-hemolytic jaundice, light without treatment, heavy often with early childhood death.