Obstructive jaundice is caused by obstruction of the bile ducts as they flow through the bile ducts into the intestines, which can lead to obstruction of bile flow and various clinical abnormalities. The causes of obstructive jaundice include bile duct tumors, bile duct stones, inflammation, parasites, and benign stenosis of the bile ducts, all of which may lead to bile stasis. Depending on the location of the obstruction, it can be divided into intrahepatic and extrahepatic, and intrahepatic can be divided into intrahepatic obstructive cholestasis and intrahepatic cholestasis. When bile duct obstruction occurs, bile will form stasis in the bile ducts, causing the pressure in the bile ducts to increase and the bile ducts to dilate, leading to the rupture of capillary bile ducts and small bile ducts, and bile will enter the lymphatic ducts of the patient and then enter the blood circulation, leading to an increase in bilirubin in the blood and causing jaundice, usually with a dark yellow color of the mucous membrane of the skin, or a dark yellow or even yellow-green color if the bile ducts are completely obstructed. Itching of the skin and bradycardia may occur, and the urine may be darkened to a strong tea color, and the stool may become lighter or white clay in color. If jaundice occurs without pain, the possibility of bile duct cancer or pancreatic head cancer should be highly considered. If a patient shows signs of obstructive jaundice, prompt examination should be performed to determine the cause of bile depression.