ERCP refers to endoscopic retrograde cholangiopancreatography, in which stones can be removed; ERCP for choledocholithiasis has certain risks, which may cause postoperative bleeding, pancreatitis or perforation. 1. Postoperative bleeding: ERCP for choledocholithiasis requires incision of the duodenal papilla and removal of the stone after dilatation, which may cause repeated bleeding if the hemostasis is not exact. A small amount of bleeding is not a serious problem, but a large amount of bleeding may cause ischemic shock or anemia. 2. Pancreatitis: generally due to repeated intubation operations during the operation, resulting in edema of the duodenal papilla, leading to poor circulation of pancreatic fluid. Pancreatitis is mildly manifested as abdominal distension and abdominal pain, but can be life-threatening in severe cases. 3. Intestinal and bile duct perforation: Intraoperative operation errors can lead to perforation of the duodenum or bile duct, resulting in the need for further surgical treatment. If you need to do ERCP to remove choledocholithiasis, it is recommended that you go to the hospital before the operation to find out whether you meet the conditions of the operation, and then follow the doctor’s instructions for the choice of treatment plan.