Peptic ulcers typically include gastric ulcers, duodenal bulb ulcers, and complex ulcers, among others, all of which feature upper abdominal pain. For gastric ulcers, the pain is generally located below the xiphoid process or in the upper left abdomen, primarily occurring after meals and often accompanied by symptoms such as abdominal bloating and acid reflux. Duodenal bulb ulcers usually present as hunger-like pain in the upper abdomen, which can be alleviated by eating and may include nighttime pain, often with significant acid reflux and heartburn. These can be definitively diagnosed via gastroscopy. Additionally, many elderly individuals may develop gastric ulcers after taking nonsteroidal anti-inflammatory drugs, often without significant pain, typically requiring a gastroscopy for accurate diagnosis.