Bile drains can be placed for periods ranging from 2 weeks to 3 months. Prolonged drainage can cause digestive dysfunction, in addition to the formation of fistulas, which are not conducive to recovery from the disease. Bile is an important part of the digestive juices, which has the ability to hydrolyze macromolecular nutrients in food for absorption, protect the mucosa of the digestive tract, affect the epithelium of the digestive tract, and regulate the release of other hormones. Prolonged bile drainage will not only lead to malabsorption, but may also cause gastrointestinal mucosal atrophy and other diseases, and prolonged placement of the drainage tube will cause the drainage channel not to heal, increasing the risk of infection. Bile duct drainage is commonly used in cases of obvious inflammation of the common bile duct and the need for biliary drainage and decompression, the combination of insufficiently smooth or narrowed papillary openings after the removal of stones, acute biliary pancreatitis, intrahepatic bile duct stones, and so on. Drainage is usually left in place for 2 weeks to 3 months. The exact duration of placement is determined by the clinician.