Small intrahepatic bile duct stones are actually a relatively common occurrence in physical examinations and the symptoms should not be serious because the stones actually develop retrogradely from the bile ducts and common hepatic duct to the tertiary bile ducts. In the case of simple small intrahepatic bile duct stones without bile duct dilatation, no specific clinical management is actually required, and patients usually do not have abdominal pain, fever, or other manifestations of biliary tract infection. Therefore, it is recommended that if small intrahepatic bile duct stones are found and no bile duct dilatation is detected by ultrasound, no clinical management is recommended for the time being and the patient can come to the hospital for review every 3-6 months. Ultrasound is the most common and most frequently used means of review. If the conditions of the hospital are limited, a plain CT can be done for review to see if there is any change in the location of the stone and if there is any secondary bile duct dilatation. If the patient has bile duct dilatation and localized liver segment atrophy, clinical treatment is required.