Bile duct stones can be categorized as intrahepatic bile duct stones and extrahepatic bile duct stones, neither of which can be removed through the nose. They can be removed by ERCP (retrograde cholangiopancreatography), an oral endoscopic biliary treatment technique. The main advantage of ERCP is that this is a non-invasive operation, patients do not need to open or invasive operation, the operation time is short, to avoid postoperative wound infection and so on; the operation cost is cheaper than the operation, faster recovery, shorter hospitalization time and other advantages. For patients, they should consult a doctor in time to confirm the diagnosis. After clarifying the condition, follow the doctor’s instructions to take the appropriate surgical method for treatment.