Acute Cholecystitis (Inflammation of the gallbladder). A gallstone that becomes lodged in the neck of the gallbladder can cause inflammation of the gallbladder (cholecystitis). In some case this may lead to pus formation in gall-bladder, leading to severe pain and fever that require hospitalisation and treatment.
Jaundice & Cholangitis (Blockage of the common bile duct & Fever). Gallstones can block the tubes (ducts) through which bile flows from your gallbladder or liver to your small intestine. Jaundice and bile duct infection (Cholangitis) can result.
Acute Pancreatitis (Blockage of the pancreatic duct). The pancreatic duct is a tube that runs from the pancreas to the common bile duct. Pancreatic juices, which aid in digestion, flow through the pancreatic duct. A gallstone can cause a blockage in the pancreatic duct, which can lead to inflammation of the pancreas (Pancreatitis). Pancreatitis causes intense, constant abdominal pain and usually requires hospitalization.
Gallbladder cancer. People with a history of gallstones have an increased risk of gallbladder cancer. But gallbladder cancer is very rare, so even though the risk of cancer is elevated, the likelihood of gallbladder cancer is still very small.