Some patients also need to undergo gastroscopy after barium meal examination, which can further clarify the diagnosis and treatment. Barium meal examination is mainly used for the diagnosis of gastrointestinal diseases, which can diagnose chronic gastritis, gastric ulcer, and can detect malignant lesions in the stomach at an early stage. However, barium meal examination has limitations, which can not directly observe the mucosa of the gastrointestinal tract and can not be treated. For patients whose condition is already relatively serious as found by barium meal examination, or those who are clinically considered to have malignant lesions but have not yet been determined, further examination by gastroscopy can be conducted. Gastroscopy can directly observe the morphology of the gastric mucosa, and more intuitively and accurately determine the lesions in the stomach. Some patients can also have lesion specimens collected under the direction of gastroscopy and then pathologically examined, and some patients can also be treated under gastroscopy, such as removing gastric polyps. Barium meal and gastroscopy each have their own advantages, and patients with gastric lesions should choose the appropriate test under the guidance of their physician.