The gallbladder is an organ just under the right rib cage. It stores the bile, or liquid made by the liver to digest fats. The gallbladder is actually a large muscle that contracts and forces the bile into the intestine when we eat. Gallstones can form in the gallbladder. Often there are no symptoms, however if a stone blocks the outlet of the gallbladder, a gallbladder "attack", or pain, may develop. People live perfectly normal lives without their gallbladder, should it need to be removed.