H. pylori breath test values of carbon 13 at 0-4 dpm are considered normal and carbon 14 at 0-100 dpm are considered normal. If there are frequent clinical manifestations of stomach discomfort, heartburn, acid reflux, nausea, vomiting, burping, etc., it is mainly considered to be caused by chronic gastritis or gastric ulcer. The diagnosis can be confirmed by promptly going to the hospital for a breath test, which is performed in the following two ways: i. A breath test test for carbon 13, the results of which are in the normal range of 0-4 dpm, usually represents the absence of H. pylori infection in the stomach and does not need to be treated. However, the recent use of proton pump inhibitors and antibiotics can affect the test value and give a false negative. Second, if the carbon 14 breath test is performed, the normal value of the test result should be in the range of 0-100 dpm. before the test itself should first clarify which test is done, and the normal values of the two tests will be different, but when the doctor says positive for H. pylori during the test, it means that it has been infected.