Breath test mainly includes C13 breath test and C14 breath test, which is a non-invasive test and is an important basis for initial screening and diagnosis of the presence of H. pylori infection. A positive result usually means the presence of H. pylori infection, it is recommended to improve the gastroscopy sampling test, urease test and other related tests in time to clarify the diagnosis, so as to avoid the phenomenon of missed diagnosis and misdiagnosis. If H. pylori infection is clearly present, it is usually accompanied by symptoms such as bad breath, nausea, vomiting, acid reflux, stomach pain, and upper abdominal discomfort. Patients are advised to go to the hospital in a timely manner and, depending on the specific situation, apply quadruple therapy under the guidance of a professional physician to help eliminate H. pylori and improve the cure rate. The commonly used clinical drugs are proton pump inhibitors, bismuth, metronidazole, and amoxicillin. If the patient is accompanied by serious complications such as ulcers, bleeding and perforation, he or she needs to be actively treated for the specific complications in order to avoid aggravation of the disease. Patients diagnosed with H. pylori infection need to pay attention to their daily diet and develop good eating habits. It is recommended to eat more light and easily digestible food, and to minimize spicy and stimulating as well as greasy food. Patients with H. pylori infection should also avoid sharing utensils with others to avoid causing H. pylori infection in others.