Whether bile duct stones can be excreted on their own is objectively analyzed based on the size and nature of the stones: i. If the stones are less than 3mm in size and are sediment-like stones. In the process of bile excretion, the sediment-like stones may be discharged into the intestine along with the bile and will not cause bile duct blockage and the manifestation of acute cholangitis. In this case, the bile duct stones may be excreted by themselves. Second, if the size of bile duct stones is larger than 3mm, and they are granule-like stones. In this case, the stone cannot be discharged into the intestinal canal through the end of the bile duct, which may cause the stone to be embedded in the bile duct, causing the patient to have abdominal pain, abdominal distension, chills, high fever, jaundice and other manifestations of acute cholangitis. Clinically, patients often need to perform laparoscopic bile duct exploration or endoscopic bile duct extraction treatment, in which case the stones are not able to be discharged by themselves.