The main test for H. pylori, a very specific stomach pathogen, is a blow test. The presence of infection can be determined by the value of C14. If the C14 value of the blow test is greater than 100, it is basically considered positive, meaning that H. pylori infection is present, while if the C14 value is less than 100, it is within the normal range. It is important to note that once infected with H. pylori, the bacteria will exist for life and basically cannot be completely killed, and often there are no symptoms of H. pylori infection, but long-term infection will bring great damage to the patient’s gastric mucosa and even increase the chance of stomach cancer. It is recommended that if a patient is infected with H. pylori, he or she must seek medical attention in a timely manner, and can be treated with quadruple therapy and reviewed one month after stopping the medication.