Duodenal ulcer is not considered a serious gastrointestinal disease, but complications such as bleeding and perforation are more serious and need to be taken seriously. Duodenal ulcer is mainly refers to the duodenal mucosa ulcer, compared with inflammation is relatively serious. If not effectively controlled, the ulcer continues to develop and can lead to many complications, such as bleeding, perforation, obstruction and so on. For example, duodenal ulcers are susceptible to perforation, obstruction, and bleeding risks. Acute perforation can lead to acute peritonitis, and hemorrhage can lead to hemorrhagic shock, and obstruction can lead to severe vomiting. If the diagnosis of duodenal ulcer, should follow the doctor’s advice and active treatment, to avoid serious consequences.