HP is the abbreviation of Helicobacter pylori, and the clinical detection of Helicobacter pylori is divided into two kinds of 13-carbon and 14-carbon breath test, in which the reference range of the normal value of 13-carbon is less than 4, and the reference range of the normal value of 14-carbon is less than 100DPM. 1. 13-carbon breath test: during the test, the carbon dioxide value of carbon 13 isotope in the exhaled gas of the patient is less than 4, which indicates that there is no H. pylori infection and H. pylori is negative; when the value is greater than 4, it is positive for H. pylori. 2.14 Carbon breath test: the normal value is 0 to 100 DPM at the time of testing; if the patient exceeds 100 DPM at the time of testing, he/she is H. pylori positive and requires treatment. Whether H. pylori is normal or not, you can go to the hospital for a 13-carbon or 14-carbon breath test. If you are infected with H. pylori, you need to go to the hospital in time and follow the doctor’s instructions for treatment.