Helicobacter pylori may cause gastric cancer, but the chance is relatively small, as long as the active treatment can be cured. Specifically as follows: 1. H. pylori can damage the protective barrier of the gastric mucosa, destroying the self-protection mechanism and repair function of the gastric mucosa. H. pylori can lead to chronic gastritis, gastric ulcer, duodenal ulcer and other diseases, but also accompanied by bad breath symptoms, and in serious cases, it can also lead to gastric cancer, which is the bad prognosis of H. pylori infection. 2, H. pylori can be cured, and is usually treated with medication, and pay attention to the diet, and to develop good dietary habits and habits, as long as the active cooperation with the treatment is cured, and will not become gastric cancer. As long as you actively cooperate with the treatment, it can be cured and will not turn into stomach cancer. If it is not treated in time or not treated properly, there is a possibility of malignant transformation, especially chronic atrophic gastritis, which has a high risk of cancer.