For the patient’s liver function test, if it indicates low transpeptidase, which is also known as low GGT in liver function. If it is simply a low level, it does not mean that it has clinical significance and the patient is advised to continue to observe. After two weeks, continue to draw blood to check the liver function to see if the patient’s GGT is back to normal. If the patient has elevated GGT, elevated alkaline phosphatase, and combined with elevated total bilirubin and direct bilirubin. In this case, we should consider the possibility of biliary obstruction, and further investigation of upper abdominal ultrasound and MRI of the upper abdomen, which is the MRCP water imaging of the biliary tract, is needed. After these examinations, we can diagnose the cause of biliary obstruction, whether it is caused by stones or by tumor compression in the biliary tract. If it is caused by stones, ERCP treatment should be actively considered. If the obstruction is caused by biliary tumor disease or pancreatic tumor compression, surgical treatment should be actively considered.