The examination of Helicobacter pylori includes urea breath test, detection of Helicobacter pylori antibodies in serum, histological detection method, etc. The specific examination methods are as follows: 1. Urea breath test: Breath test has 13C and 14C breath test, such as carbon 14 urea breath test test check to follow the doctor’s instructions to take medication, sit and wait for 30 minutes after blowing for about 3 minutes, until the liquid in the collection bottle becomes pink, and then put into the instrument to detect. Fasting is required before the test, if you are taking antibiotics or antiseptic drugs need to stop for more than 4 weeks, acid suppression need to stop for more than 2 weeks, otherwise the results will be false-negative. 2. Gastroscopy rapid urease test: this test can detect Helicobacter pylori infection. 3. Histological detection method: It is to take out a piece of gastric mucous membrane tissue for staining through gastroscopy to do pathological examination, and it is not excluded that the mucous membrane tissue taken is free of bacterial infection. This method is more expensive and invasive, so most patients do not take this test as the first choice. If Helicobacter pylori infection is suspected, it is necessary to consult a doctor in time for standardized examination and treatment.