A 2cm stone choledochal is usually not expelled on its own, and may be expelled on its own if the stone is relatively small, under 0.5cm. Choledochal stones usually occur in the lower end of the common bile duct, most of them are formed in the bile duct, there may be persistent pain in the right upper abdomen, and there may also be nausea, vomiting, biliary bleeding, etc. The lower the stone is, the easier it is to block the common bile duct. If the stone is relatively large, surgical treatment can be used to remove the stone, contact the obstruction, and prevent the infection of the common bile duct. If it is below 0.5cm, it may be discharged on its own, but the chances are relatively small. Usually eat more fresh fruits and vegetables, avoid eating some fat, cholesterol content of high food, you can eat more tomatoes, carrots and other foods rich in vitamin A, can assist in the treatment of the disease to improve the condition. It is recommended to go to the hospital in time, under the guidance of the physician for treatment.