Indicators of H. pylori include a positive carbon 13 or carbon 14 urea breath test and a positive rapid urease test. 1. Positive Carbon 13 or Carbon 14 Urea Breath Test: Generally, Carbon 13 Breath Test is negative if the test value is less than 4, if the test result is more than 4, it indicates that the patient may be infected with H. pylori. The normal range of carbon 14 breath test is 0~100, and a value greater than 100 is positive. 2. Positive rapid urease test: the urease produced by H. pylori can decompose urea, and the ammonia produced can neutralize the gastric acid that has back-penetrated into the mucus, forming a local micro-environment conducive to the settlement and reproduction of H. pylori, and chronicizing the infection. In addition to the above methods, H. pylori testing has a variety of testing methods, such as fecal antigen detection and serum antibody testing, etc. If the test results are abnormal, you should go to the hospital in a timely manner to determine the cause of the disease and standardized treatment.