Biliary obstruction is an obstruction of the bile ducts due to gallstones, tumor occupancy, parasites and other causes. Biliary obstruction includes biliary atresia and other causes of biliary obstruction. The pathogenesis of the two diseases is different, but the clinical symptoms are basically the same. Specific analysis is as follows: 1. Biliary atresia: Biliary atresia is caused by physical factors during the development of embryo or its own developmental insufficiency, mostly seen in newborns. Its clinical symptoms can be manifested as jaundice and progressive aggravation in newborns. Surgery is usually required. 2. Biliary tract obstruction: Biliary tract obstruction is mostly caused by gallstones, tumors, parasites and so on. Its clinical manifestations are nausea, vomiting, right upper abdominal pain, jaundice, fever and so on. If the bile duct is completely blocked, clay-like feces may also appear. Surgical treatment is usually required. Therefore, when the patient has jaundice, it is recommended to go to the regular hospital for examination in time, to clarify the cause of the disease as early as possible, and to carry out treatment according to the doctor’s comprehensive judgment. Never delay the condition, resulting in the aggravation of the condition.