Helicobacter pylori (Hp) is the cause of gastritis, gastric ulcer, duodenal ulcer and other diseases, and is closely related to the occurrence of gastric cancer. Urea carbon 13 breath test has the following characteristics: the test is non-invasive and painless, without any toxic side effects (except for a very small number of allergic patients); it is simple, convenient and quick, patients can blow into the bag before the test on an empty stomach or 2 hours after a meal, and then blow into another bag 25 minutes after taking the urea carbon 13 capsule orally; the sensitivity and specificity of the test for Hp are higher than those of general tests, with an accuracy rate of more than 95%; there is no radioactive contamination, and it can be used for No radioactive contamination, can be used for infants, pregnant women, lactating women and women preparing for pregnancy and childbirth; lower cost; report can be obtained a few minutes after the test is completed. Caution: The test must be performed on an empty stomach or two hours after a meal, and the patient must not have taken antibiotics, bismuth preparations, proton pump inhibitors, or other Hp-sensitive drugs within the last month, otherwise the test result will be false negative. H. pylori does not kill everyone Chinese people eat in a plate of dishes, H. pylori can be transmitted through saliva via the digestive tract, so it is not surprising that one person has the disease the whole family infection. H. pylori infection is an important risk factor for the development of gastric cancer, and is also associated with gastritis, gastroduodenal ulcer, gastric mucosa-associated lymphoma and other diseases. However, it should be emphasized that although H. pylori can cause various gastric diseases, it is not a determinant of cancer. There are three common groups of people who need eradication treatment: people with gastric or duodenal ulcers, even if the ulcers have healed, to prevent recurrence; people whose parents and other immediate family members have gastric cancer; and people with chronic atrophic gastritis. Other people are not recommended for treatment, especially those who do not have any symptoms like Miss Yang, otherwise it is easy to lead to drug resistance of the bacteria. If a member of the family detected the bacteria, you can pay attention to the dietary habits, but do not need to be completely isolated. As H. pylori is not heat-resistant, the dishes can be boiled in a pot for 3 minutes to kill the bacteria; wash your hands before and after meals, eat raw and cold food to be hygienic, and when eating out in a group, it is best to use communal chopsticks or share meals.