Methods of detecting H. pylori include 13C or 14C urea breath test, rapid urease test, fecal H. pylori antigen test, and microscopic examination of tissue sections. 1. 13C or 14C Urea Breath Test: One of the most commonly used methods in clinic, such as 13C Urea Breath Test, the examinee first collects one breath for comparison, then takes urea containing carbon labeling, and leaves it for 30 minutes, then collects one breath, and finally the two bags of gases collected are tested. 2. Rapid urease test: one of the most commonly used methods in clinic, this method requires taking a small piece of gastric mucosa tissue through gastroscope and putting it into the test reagent containing urea, because H. pylori can secrete urease, which breaks down the urea and produces ammonia, which will make the indicator turn red. 3. Fecal H. pylori antigen detection: the antigen of H. pylori can be found in stool, and Hp antigen can be detected in stool by enzyme-linked immunoassay. 4. Tissue section microscopy: small pieces of gastric mucosa are taken through the gastroscope for sectioning and staining, and then observed under the microscope for the presence of H. pylori. If the test result shows H. pylori infection, it is recommended to consult a doctor in time to clarify the cause of the disease and to carry out targeted treatment or therapy with the help of the doctor.