The causes of elevated bilirubin can be generally grouped into three categories: first, those caused by hematologic factors, such as hemolytic jaundice; second, those caused by liver diseases, such as hepatitis and hepatocellular jaundice caused by cirrhosis; and third, those caused by biliary tract diseases, such as bile duct stones and pancreatic head cancer. Hepatocellular jaundice is caused when the hepatocytes produce lesions, and the bilirubin in the liver cannot be converted into bile properly, or leads to swelling and destruction of hepatocytes, and other factors, and produces jaundice; some should also pay attention to biliary tract and common bile duct diseases, such as bile duct stones, liver cancer, pancreatic head cancer, etc. These diseases may cause obstruction of the bile duct, and produce obstructive jaundice. If a patient has elevated bilirubin, further examination of the cause of the bilirubin elevation should be performed, such as ultrasound examination to observe the condition of the liver and bile ducts, as well as liver function tests. It is important to pay special attention to the obstruction of the head of the pancreas, common bile duct and intrahepatic bile duct, as well as the examination for hemolysis.