H. pylori colonizes the human gastric mucosa and is one of the most common bacterial pathogens. This bacterial infection can cause chronic gastritis and lead to gastric ulcers and gastric atrophy, which can develop into gastric cancer in severe cases. To pay attention to life, you can go to the hospital to do some tests to detect H. pylori, detection methods include breath test, biopsy, blood test, stool test, etc., of which breath test is most commonly used. Test method 1, breath test: commonly used test for carbon-13 breath test and carbon-14 breath test, the principle is the use of bacterial secretion urea production of ammonia and carbon dioxide. The specific method is by swallowing a capsule to detect whether the patient exhaled gas with carbon-13, carbon-14 labeled carbon dioxide, so as to determine whether there is H. pylori infection in the stomach, the results are more accurate, the most commonly used in clinical practice. 2, biopsy: gastroscopy to take biopsies for testing, and then by doing urease test or looking for bacteria under the microscope, for invasive testing. 3, blood sampling Test: Determined by checking whether the patient has H. pylori antibodies in the blood, the results of which mostly respond to previous infections. 4, stool test: determined by testing the patient’s stool for the presence of H. pylori, the test is H. pylori antigen. Breath test test precautions 1, the test should be carried out on an empty stomach; 2, the method is to blow into the blow bag, then swallow the capsule with warm water and sit still for 30 minutes, then blow into the blow bag to retain the sample, and then put the breath bag into the instrument for testing; 3, the capsule should not be bitten during the above process; 4, the test should not be performed during the administration of antibacterial drugs.