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What is the difference between a gastric ulcer and a compound gastric ulcer?
Compound gastric ulcer refers to a gastric ulcer combined with a duodenal ulcer. It is usually located where the stomach meets the duodenum.

Gastric ulcer is a symptom that occurs when the gastric mucosa is digested by gastric acid and pepsin due to weakening of the mucus bicarbonate barrier layer on the surface of the gastric mucosa caused by medications, psychiatric factors, and other factors.