Blowing is often referred to as the carbon 13 or carbon 14 breath test, and is an effective method for detecting H. pylori, a process that takes approximately 35 minutes and is currently the internationally recognized gold standard for H. pylori detection. The principle of the H. pylori test is the carbon 13 or carbon 14 isotope breath test, in which the patient simply blows into a specific disposable breath test card to detect the number of H. pylori infections in the stomach and intestines. Patients need to come to the hospital on an empty stomach and take carbon 13 or carbon 14 urea capsules orally. If there is H. pylori in the stomach, the bacteria will secrete urease and hydrolyze urea, which will be hydrolyzed to form carbon dioxide, which will enter the lungs with the blood and be expelled as a gas, so the breath test can identify whether the patient has H. pylori infection more accurately. The breath test is recommended to be done on an empty stomach. It is recommended that the patient should do it on an empty stomach, and it is best to stop using PPI acid suppressants, bismuth preparations, and antibiotics for about 1 month before doing the H. pylori test, which will be more accurate.