Generally speaking, recurrent gastritis, especially with oral odor, is mostly related to H. pylori infection, it is recommended to do a 13C or 14C breath test in gastroenterology, and if the test result is positive, it needs to be treated with decolonization, commonly used triple or quadruple therapy, the course of treatment 7-14 days. The specific protocol is as follows: proton pump inhibitors (such as omeprazole, rabeprazole, lansoprazole, pantoprazole, esomeprazole) 1 capsule twice a day, colloidal bismuth 0.2 twice a day (for quadruple therapy), plus two antibiotics (amoxicillin 1.0 twice a day, tinidazole 0.5 twice a day, clarithromycin 0.5 twice a day, and ofloxacin 0.2 twice a day, two of the four drugs of your choice). It is also important to note that H. pylori can be transmitted through hands, unclean food, unclean dishes and feces, so it is important to develop good hygiene habits in daily diet to prevent infection, and dishes at home should be disinfected and treated regularly, preferably with special dishes.