How long you can live with carditis is related to the nature of carditis, if it is non-atrophic gastritis, the prognosis is good through timely treatment, and the impact on life expectancy is not much different from normal people. If it is atrophic gastritis, especially with heterogeneous hyperplasia, there is a tendency to progress to gastric cancer, the prognosis is relatively poor. Most adults have mild non-atrophic gastritis, and if a patient with non-atrophic carditis is Helicobacter pylori-negative and not clinically symptomatic, treatment is not even required. If there is activity or symptoms, the prognosis is good after treatment with anti-Helicobacter pylori and protection of gastric mucosa, and the general life expectancy is the same as that of normal people. In patients with atrophic carditis, atrophy and mild heterotrophic hyperplasia can be partly improved or reversed through active treatment, but severe heterotrophic hyperplasia is easy to be transformed into gastric cancer with poor prognosis. The 5-year survival rate of middle and late gastric cancer in China is about 7% to 34%. It is recommended to consult the doctor in time after getting carditis and treat it actively to avoid adverse effects.