How to distinguish between stomach and mouth

Oral halitosis is the odor of saliva in the mouth caused by oral diseases. If there are dental caries, gingivitis, periodontitis or mucosal diseases in the mouth, it may be caused by oral problems. Non-oral halitosis may be caused by gastrointestinal diseases or helicobacter pylori infection. If there is a history of gastrointestinal diseases or helicobacter pylori infection, it may be considered to be caused by stomach halitosis. Show symptoms of halitosis, need active treatment, pay attention to oral hygiene. The above health science knowledge is for reference only, the specific situation needs to be checked in a regular hospital, judged by a professional doctor.