Choledocholithiasis can be restored to its former state by doing ercp. ercp that is ERCP is known as endoscopic retrograde cholangiopancreatography, refers to the endoscope such as duodenoscope, through the mouth, esophagus, stomach, duodenum, duodenal large papilla retrograde into the common bile duct, injected with contrast medium after X-ray film, used to show the pancreas and bile ducts of the technology. Currently, ERCP can remove choledochal stones in addition to contrast. Generally, patients with choledochal stones can be restored to their previous state by ERCP, and the duodenal papilla is seldom damaged. If the choledocholithiasis is too large to be removed by ERCP, surgery is usually recommended, such as choledochotomy and T-tube drainage. If you have a choledochal stone that requires ERCP, it is recommended that you go to the hospital in a timely manner and follow the doctor’s instructions.