Fast way to get rid of bad breath is to chew gum, drink milk, eat peanuts, drink more water, reduce the consumption of raw onions, raw garlic, odorous food and other methods can quickly relieve bad breath, but in the final analysis, we need to find the cause. 1, oral causes, regular visits to the regular stomatology department, pay attention to oral hygiene, such as brushing twice a day and the use of fluoride toothpaste, mouthwash rinsing after meals, brushing and flossing and not toothpicks, less sugar and more food to protect tooth enamel. 2, gastric causes, gastroscopy and Helicobacter pylori examination, most commonly found in gastric ulcers, duodenal ulcers and gastroesophageal ulcers. The reason for the bad breath is gastric ulcers, duodenal ulcers and gastroesophageal reflux syndrome. It is recommended that patients with Helicobacter pylori infection undergo triple therapy and be rechecked one month after stopping the medication.