The main auxiliary examinations for patients with gastric ulcer are as follows: a. Gastroscopy, which is the most preferred examination method to confirm the diagnosis of gastric ulcer, can not only see the change of gastric mucosal ulcer, but also do endoscopic biopsy, which can clearly identify the benignity and malignancy of the ulcer. Second, the barium meal examination, if the gastric ulcer patients are poor or older, can not do gastroscopy is to consider barium meal examination, but barium meal examination is not to take a biopsy. Third, the need to do the H. pylori test, because gastric ulcer patients are more likely to combine H. pylori infection, H. pylori test if positive, it is necessary to anti-H. pylori treatment. Fourth, you can also do a gastric function test, which can help analyze the amount of gastric acid secretion and the determination of gastrin.