A slightly enlarged gallbladder generally indicates obstruction of the bile duct, which is mainly considered in the cystic duct and lower bile duct, and the causes of obstruction are generally considered to be benign and malignant lesions. Among benign lesions, gallbladder stones or inflammation are the most common, such as obstruction by stones in the cystic duct, edema and inflammation in the lower part of the common bile duct and duodenal papilla area can cause a slightly enlarged gallbladder, and generally this slightly enlarged condition can be reversed after the inflammation subsides or the stone obstruction is lifted. Malignant lesions are generally considered to be bile duct obstruction caused by gallbladder cancer, or bile duct obstruction or compression caused by occupying lesions in the lower bile duct, duodenal papilla, and pancreatic head area, and patients with such symptoms generally show jaundice, and this jaundice continues to have a tendency to deepen and will not be relieved, only through surgical treatment.