H. pylori is a bacterium that does not directly cause stomach pain. It is only when H. pylori causes gastritis, peptic ulcers, or stomach cancer that abdominal pain may occur. H. pylori is often a bacterium that causes these diseases. When patients are clearly tested for the presence of H. pylori infection, it is recommended that they be treated with medication to eradicate H. pylori as appropriate under the guidance of a specialist. Peptic ulcer is a relatively common disease that may be complicated by bleeding, perforation, obstruction, and cancer if left untreated. More serious is that H. pylori can cause gastric cancer, patients must pay attention to it, H. pylori infection usually does not directly appear stomach pain symptoms.