The main symptoms of cholecystitis include sudden onset of pain in the upper right abdomen, which can radiate to the back or right shoulder. It commonly occurs after consuming a large amount of fatty foods or during the night. Symptoms also include fever, chills, nausea, vomiting, poor appetite, and less desire to eat. A routine blood test will show increased white blood cells and neutrophils. An upper abdominal CT or abdominal ultrasound can detect cholecystitis. In terms of treatment, the first approach is symptomatic treatment, which can involve using antispasmodic and analgesic medications. The second approach is anti-inflammatory treatment. Furthermore, the diet should be light and easy to digest, and fatty, rich, and greasy foods should be avoided.