After the H. pylori treatment has turned negative, we should pay attention to the review and strengthen the dietary hygiene to prevent recurrence of the disease. 1. Pay attention to the review: after the H. pylori treatment has become negative, there is also the possibility of recurrence, so it is necessary to carry out regular review, which can be carried out 4 weeks after stopping the drug, in order to find out whether it has completely become negative; if the disease recurs, it should continue to receive standardized treatment. 2. Enhance hygiene: first of all, personal hygiene should be strengthened, washing hands before and after meals; secondly, dietary hygiene should be strengthened, using chopsticks during meals, and cooking food well before consumption, which can play a role in preventing Helicobacter pylori infection. Helicobacter pylori is contagious and may also cause gastritis, peptic ulcer and other diseases, once diagnosed, should actively cooperate with the doctor for treatment, and full dosage and full course of medication, in order to minimize the adverse effects on the body.