The examination with a gastroscope mainly focuses on checking for any damage to the mucous membranes of the stomach and esophagus. It can detect gastritis, gastric ulcers, or stomach cancer. For some patients who might have a tendency toward cancerous changes, a pathological examination can be conducted. However, testing for Helicobacter pylori with a gastroscope requires a separate lab test. Therefore, routine gastroscopic examinations generally do not include testing for Helicobacter pylori. If testing for Helicobacter pylori is needed, it is a separate examination item. Nowadays, since undergoing a gastroscopy can be quite uncomfortable and cause symptoms like nausea for some people, testing for Helicobacter pylori is accurately conducted using a breath test.