The results of the 30-second self-test for H. pylori are not yet reliable, and there are two types of H. pylori testing: non-invasive and invasive methods. 1. Non-invasive methods: (1) Carbon 13 or carbon 14 urea breath test: the urease produced by H. pylori can decompose urea, the examinee orally consumes urea containing carbon 13 or carbon 14 labeled urea, if there is H. pylori infection, the urea can be decomposed into carbon dioxide by urease produced by H. pylori, etc., and the amount of carbon dioxide with the labeled carbon dioxide that can be exhaled can be judged by measuring. (2) Fecal antigen detection: H. pylori antigen can be detected in stool by ELISA. 2. Invasive methods: (1) Rapid urease test: gastric mucosa tissue is taken through gastroscopy, and the tissue is put into H. pylori rapid urease detection reagent, and the changes of the reagent are observed to determine whether there is H. pylori infection. (2) Gastric mucosal tissue sectioning and staining microscopy: Gastric mucosal tissue is sectioned, stained, and microscopically examined to see if H. pylori is present. There are many ways to detect H. pylori. If you suspect that you have H. pylori infection, it is recommended that you consult a doctor in time and choose the appropriate test method with the help of your doctor to make a clear diagnosis and carry out targeted treatment.