Bad breath, medically called halitosis, can result from poor oral hygeine, dry mouth and smoking and sometimes may be a sign of other health problems. Bacteria that build up on your teeth – particularly between them – as well as your tongue and gums, can produce unpleasant-smelling gases. These bacteria are also responsible for gum disease and tooth decay. Bad breath can also be made worse by the types of foods you eat and other unhealthy lifestyle habits. Persistent bad breath is a sign of gum diseases.
If you eat foods with strong odors (such as garlic or onions), brushing and flossing — even mouthwash – merely covers up the odor temporarily. The odor will not go away completely until the foods have passed through your body.
Many other diseases and illnesses may cause bad breath. Here are some to be aware of: respiratory tract infections such as pneumonia or bronchitis, chronic sinus infections, postnasal drip, diabetes, chronic acid reflux, and liver or kidney problems.
Bacteria can also live on the surface of your tongue. As well as brushing your teeth, cleaning your tongue can also help control bad breath.
You should have regular dental check-ups to ensure any oral hygiene problems are picked up and treated early.