Gallstones 2cm may require surgery, but the exact need for surgery needs to be considered in combination with other conditions. Surgery is needed if there is a combination of symptoms, a large number of stones, calcification of the gallbladder, and porcelain gallbladder. The details are as follows: The indication for surgery for cholecystectomy is the presence of symptoms and/or complications. It should be emphasized that children with gallbladder stones, as well as as asymptomatic adults with gallbladder stones, do not usually undergo prophylactic surgery. However, surgery is considered if there is a combination of a high number of stones, calcification of the gallbladder wall, porcelain gallbladder, or gallbladder polyps ≥1 cm. If the patient has gallstones 2 cm without any uncomfortable symptoms or without other gallbladder complications, surgery is usually not required. Meanwhile, if there is a history of obstruction of the common bile duct, lesions of the common bile duct are found during surgery, or the diameter of the common bile duct is >1cm, then exploration of the common bile duct may be performed to check whether there are small stones that have fallen into the common bile duct and caused obstruction of the common bile duct. A T-tube is usually placed to drain the bile after the common bile duct exploration. If symptoms such as jaundice, fever, or abdominal pain occur, seek medical attention as soon as possible to avoid delay.