There are three ways to check H. pylori by gastroscopy and most of them are accurate. First, take the pathology for pathology examination, this method is very accurate, but you need to go to the pathology department for examination, it takes a long time and it is difficult to get the result on the same day. Second, take biopsy for urease test under gastroscope, the result can be out in 3 minutes, most of them are accurate, but there is a possibility of false negative. Third, through the gastric mucosa microscopic performance to determine whether there is an infection, the accuracy can reach about 70% -80%. However, gastroscopy is an invasive test, so if you are simply checking for Helicobacter pylori, it is recommended that you choose another method.