The examination of H. pylori includes blowing carbon 13 and carbon 14 tests, as well as blood antibodies to H. pylori and gastroscopy. Generally choose blowing test more, carbon 13 radioactive less, carbon 14 more radioactive, especially not applicable to pregnant women and infants, so in clinical, if there is recurrent infection of H. pylori generally choose carbon 13 test, in the clinical H. pylori examination and treatment, at present we all attach great importance, it is recommended that if there is peptic ulcer, gastric lymphoma, for H. pylori treatment.