Complications after cholecystectomy: The gallbladder is an important digestive organ in the body and cannot be removed at will. The traditional treatment for gallbladder stones and polyps is cholecystectomy, which has many complications: recent complications: bile duct injury leading to obstructive jaundice, diarrhea, reflux gastritis, esophagitis; long-term complications: common bile duct stones, intrahepatic bile duct stones, sphincter of Oddi motor dysfunction, colon cancer. Most of the post-cholecystectomy syndromes actually refer to the motor dysfunction of the sphincter of Oddi resulting from the dysfunction of the sphincter of Oddi: most of them start to appear 2-4 years after cholecystectomy, gradually worsen, or recurrent, paroxysmal worsening, manifesting as abdominal distension and pain, with varying degrees of posterior back discharge pain, acid reflux, heartburn, aggravated after eating, and prolonged awakening with pain at night. The important features are: CT, ultrasound, MRI and all laboratory tests of the liver, biliary and pancreatic are not abnormal. Methods of treatment: The only and best method is ERCP technique.