This document summarizes key information about peptic ulcers, including their clinical features, investigations, and management. It describes the symptoms of duodenal ulcers such as epigastric pain worsened by an empty stomach, and of gastric ulcers such as pain after eating and weight loss. It outlines non-invasive and invasive investigations for ulcers and lists lifestyle changes, medications, and surgeries that can be used in management. These include quitting smoking, reducing stress, and using antacids, H2 blockers, proton pump inhibitors, or surgery for perforated ulcers or bleeding.