Helicobacter pylori infection can cause bad breath

Helicobacter pylori infection usually causes halitosis.

Helicobacter pylori is a common stomach bacterium that can cause stomach problems and digestive tract ulcers. During the period of Helicobacter pylori infection, the bacteria in the mouth and its metabolites are abnormal under the stimulation of pathogenic bacteria, which may lead to an increase in stomach pH, gastric juice may flow back into the esophagus, thus changing the odor in the mouth and causing halitosis

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