Bad breath can have many different causes.
- Food: Foods such as garlic and onions are especially known to contribute to bad breath. When we eat, the food is absorbed into the bloodstream and transferred to our lungs. As we breathe the odour is expelled, causing bad breath. This lasts until our body has eliminated the food. If you cannot properly brush or floss your teeth immediately after eating, try to rinse your mouth with water - this will help to dislodge food particles and moisten your mouth. If your meal comes with raw parsley as a garnish, chew on it - it's a natural breath freshener!
- Improper oral hygiene: Proper tooth and tongue brushing and flossing can make all the difference if you suffer from bad breath. Without proper oral hygiene, food particles and bacteria left in the mouth after eating can cause bad breath. It is important to learn the proper way to brush and floss, and then practice what you learn.
- Smoking: Along with the damage that smoking does to our overall health, teeth, and gums, it is also a cause of bad breath.
- Medications: Some drugs, such as antihistamines and decongestants, cause bad breath by making your mouth dry. Dry mouth, which is explained next, is a contributor to bad breath.
- Dry mouth (xerostomia): Dry mouth occurs when the flow of saliva decreases. As previously mentioned, it can be a side effect of certain medications. Dry mouth can also be caused by salivary gland problems, excessive talking, exercising, dieting, smoking, continuous breathing through the mouth or drinking alcohol. To prevent and treat dry mouth it is helpful to drink lots of water or to use sugarless candy or gum. This will stimulate saliva flow that will then cleanse the mouth and remove particles and bacteria that cause odour.
- Gum disease (periodontal disease): Periodontal disease is a bacterial infection of the gums that support the teeth. Individuals who suffer from gum disease are more prone to bad breath as it creates the perfect breeding ground for odour-causing bacteria to flourish. Normally the tiny space in between your gums and teeth is 1 mm to 3 mm. When you have periodontal disease the space (periodontal pockets) can grow to 5 mm or more. This allows bacteria to hide in deeper and more secluded areas.
- Other medical disorders: Medical disorders that can cause bad breath include respiratory infections, chronic sinusitis, chronic bronchitis, postnasal drip, diabetes, and gastrointestinal, liver, or kidney problems.
If you have persistent bad breath that has not been treatable by proper oral hygiene techniques, you should consult with your dentist. Bad breath can often be a warning sign of periodontal disease or respiratory infection.
Suzette Alvarez, medical writer,
in association with the MediResource Clinical Team
Reviewed by Alex Yule, BDS, MDS
