The ways to detect H. pylori include invasive and non-invasive tests. 1. Invasive examination: mainly with the help of gastroscope, under the gastroscope to take the tissue of the lesion area, and then carry out rapid urease test to check whether there is H. pylori infection. 2. Non-invasive examination: the most commonly used are blood test and breath test. (1) Blood test: Detection of serum H. pylori antibodies can determine the presence or absence of H. pylori infection, but it is not possible to distinguish between previous infection and current infection. (2) Breath test: There are two types of breath tests, carbon 13 and carbon 14, which are simpler to operate and widely used in clinical practice. It can also quantitatively detect the value of bacteria, reflecting the severity of lesions. Helicobacter pylori infection is a common cause of chronic gastritis, peptic ulcers and other diseases. For those who are clearly positive for Helicobacter pylori after examination and accompanied by digestive discomfort, it is recommended to take quadruple drug therapy for eradication under the guidance of a doctor.