Duodenal Ulcer Explorer

A duodenal ulcer is a sore in the first part of the small intestine, showing how acid, H. pylori, and NSAIDs upset the balance between injury and mucosal defense; posterior ulcers can bleed from the gastroduodenal artery, while anterior ones may perforate. Click the ulcer map, switch tabs, move the balance slider, and answer the quiz questions to explore symptoms, complications, and treatment.