The occurrence of bile pigment stones is closely related to dietary structure, hygienic habits, and biliary tract infections. One of the main etiologies is biliary tract infection. The infection may be parasitic, bacterial or both (mixed type). Biliary tract infections may lead to lesions in the mucosa of the bile ducts, bile stasis, etc., which in time may lead to bile pigment stones. Bile pigment stones are usually loose and bile can be filtered through the stones at first. Patients usually do not have significant bilirubin elevation, but often have pain in the abdomen, such as vague pain or distension. Once inflammation of the common bile duct develops, the symptoms of bile duct obstruction may worsen, and the abdominal pain may worsen paroxysmally with fever, which may be moderate to high, and cause a progressive increase in jaundice.