C13 breath test costs about 50-60 dollars, but the price varies because of different reagents and measuring machines, and it is one of the commonly used clinical ways to detect H. pylori. Before the test, it needs to be measured in fasting state or 2 hours after meal, in addition, no relevant antibiotics, gastric mucosa protection drugs, such as proton pump inhibitors and other sensitive drugs have been taken in the last 1 month, otherwise it will cause false-negative test results. Because H. pylori infection is closely related to chronic gastritis, peptic ulcer and peptic tumors, if the test is positive, it is recommended to consult the gastroenterology department of the local hospital for regular antimicrobial treatment, such as triple therapy, e.g., omeprazole, clarithromycin, amoxicillin and other treatments for about half a month. Subsequently, regular review or gastroscopy will be performed to clarify the cause of the disease, and attention should be paid to the diet and daily routine in daily life.