Acute cholecystitis refers to inflammation of the gallbladder. This sudden inflammation arises due to obstruction of cystic duct by a gallstone. Symptoms of acute cholecystitis include: - Right upper quadrant pain - Tenderness - Fever - Chills - Nausea - Vomiting The condition is diagnosed through ultrasound. Treatment is done via antibiotics followed by cholecystectomy. Reference: https://www.msdmanuals.com/professional/hepatic-and-biliary-disorders/gallbladder-and-bile-duct-disorders/acute-cholecystitis Image via: https://www.cureus.com/articles/46559-complicated-acute-cholecystitis-the-role-of-c-reactive-protein-and-neutrophil-lymphocyte-ratio-as-predictive-markers-of-severity