Gall bladder localised in the upper abdomen, usually on the right side under the ribs. Location is hard to pinpoint, particularly for people with diabetes and older people. Gall Bladder surgery done most commonly for stones are usually composed of cholesterol that has crystallized from bile. They form in the gallbladder. About 80% of people with gallstones do not have any symptoms for many years, but if they leave the gallbladder and lodge in the cystic duct, the common bile duct, or the ampulla of Vater then it causes pain. People often feel nauseated and vomit. If the blockage persists, the gallbladder becomes inflamed (a condition called acute cholecystitis), causes fever. Blockage of the common bile duct or the ampulla of Vater can cause the ducts to widen (dilate). It can also cause fever, chills, and jaundice (a yellowish discoloration of the skin and the whites of the eyes). Stones that block the ampulla of Vater also can block the pancreatic duct, causing inflammation of the pancreas (pancreatitis), as well as pain. Gallstones can erode the gallbladder wall, sometimes resulting in a hole (perforation).