Intrahepatic bile duct stones are gallstones and the biliary system usually consists of the gallbladder and bile ducts. Therefore, both gallbladder stones, extrahepatic bile duct stones and intrahepatic bile duct stones are gallstones. Intrahepatic bile duct stones, also known as hepatic bile duct stones, are stones arising from the bile ducts inside the liver, and their etiology may be related to factors such as environmental factors, hereditary factors, or individual dietary habits. Clinical symptoms are not obvious, but when the patient has a low resistance such as a cold, he or she may show signs such as distension and pain in the right upper abdomen and fever. Patients with intrahepatic bile duct stones need to consult a doctor in time to make a clear diagnosis, and then carry out targeted medication or surgical treatment.