Carbon 14 test is a method to check H. pylori, mainly oral capsule on an empty stomach, generally observe for about 15-20 minutes, then blow the card, after blowing the color in the card to white, put the card into the machine for monitoring, mainly to monitor the amount of carbon 14 produced by H. pylori, to determine the active degree of H. pylori. In general, if the DPM titer is less than 200, most of them can be considered to continue clinical observation. If it is more than 700, anti-H. pylori medication is needed, and the drugs commonly used in clinical practice are gastric triplex or gastric quadruplex. If accompanied by abdominal pain or upper abdominal discomfort, it is necessary to combine with gastroscopy to further exclude the presence of ulcers, erosions or GERD.