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Acute cholecystitis

Cholecystitis (ko-luh-sis-TIE-tis) is inflammation of the gallbladder. Your gallbladder is a small, pear-shaped organ on the right side of your abdomen, beneath your liver. The gallbladder holds a digestive fluid that's released into your small intestine (bile).

Cholecystitis is often caused by stones that block the tube leading from the gallbladder to the small intestine.
Severe pain in the upper-right belly and bloating are symptoms.
Treatment includes a hospital stay and surgical removal.