Helicobacter pylori will recur even if it is cured, because infection with Helicobacter pylori will cause gastrointestinal diseases, so nowadays only detect Helicobacter pylori in the stomach and ignore the oral cavity. Even if Helicobacter pylori is eradicated from the stomach, Helicobacter pylori will enter the stomach if there is Helicobacter pylori in the oral cavity, which will lead to the recurrence of Helicobacter pylori. If you want to prevent the recurrence of H. pylori, you need to do the following: 1. Have good living habits, regular daily life, eat a balanced diet, get enough sleep every day, and strengthen physical exercise, which can help to improve the body’s immunity and resistance, and help to prevent H. pylori from recurring. 2. Have good hygiene habits, don’t drink raw water, don’t eat cold and contaminated food, and don’t share dishes. 3. Do not drink raw water, do not eat raw, cold or contaminated food, and do not share dishes. Rinse your mouth after meals and brush your teeth 2-3 times a day to maintain oral hygiene.3. Regularly test for Helicobacter pylori, 1 year after cure is the peak period of recurrence, so you need to test for Helicobacter pylori in the hospital regularly within 1 year after cure, if the test result is positive, you need to use medication under the guidance of your doctor to avoid recurrence.