Cholecystitis is the inflammation of the gallbladder, a small organ located beneath the liver that stores bile. This condition often occurs when a gallstone blocks the duct leading from the gallbladder, causing pain and swelling. Symptoms may include severe abdominal pain, nausea, and fever, making it important to seek medical attention. If left untreated, cholecystitis can lead to serious complications, such as infection or rupture of the gallbladder. Treatment typically involves medications to manage pain and inflammation, and in many cases, surgery to remove the gallbladder, known as a cholecystectomy, may be necessary to prevent future issues.