What Causes Right Upper Quadrant Abdominal Pain at Night?

Right upper abdominal pain occurring at night may be caused by a duodenal ulcer. The duodenum is located in the right upper quadrant of the abdomen, and food consumed at dinner passes from the stomach into the duodenum. Gastric acid and other digestive secretions present in this food can erode the ulcerated area, thereby causing pain. Prompt evaluation at a reputable hospital—including upper gastrointestinal endoscopy—is essential to confirm the diagnosis. If no abnormalities are found in the stomach or duodenum, abdominal CT and ultrasound examinations should be performed to rule out hepatic or biliary pathology. Early detection and timely treatment are crucial.