What is the primary symptom of cholecystitis?

The primary symptom of cholecystitis is inflammation of the gallbladder, which is a medical condition characterized by the swelling and irritation of this organ. This inflammation often results from a blockage in the cystic duct, typically due to gallstones. When the gallbladder becomes inflamed, it can lead to a range of symptoms, the most notable being severe abdominal pain, particularly in the upper right quadrant, nausea, vomiting, and sometimes fever.

While the formation of gallstones is a common cause of cholecystitis, it is not a symptom itself but rather a predisposing condition. Acid reflux and gastroenteritis are unrelated gastrointestinal issues, with different causes and symptoms, thus not applicable to cholecystitis. Therefore, recognizing inflammation as a hallmark of this condition provides a clear understanding of the pathology involved.