COMMON CONCERNS
Bad Breath Canning Vale
Persistent bad breath usually has a treatable cause. Learn the common sources, how we find them, and what actually works.
Why Bad Breath Happens
Bad breath, known clinically as halitosis, affects most people at some point. Occasional bad breath after strong foods, coffee or first thing in the morning is normal. Persistent bad breath that does not improve with brushing usually has an underlying cause that can be identified and treated.
In the majority of cases the source is inside the mouth. Bacteria that build up on the tongue, between teeth and below the gum line release sulphur compounds that cause the odour. Because the cause is usually local, treatment is often very effective once the source is found.
Common Causes
- Plaque and tartar build up, particularly below the gum line where a toothbrush cannot reach. A professional clean removes these deposits.
- Gum disease, one of the most common causes of persistent bad breath. Read more about gum disease signs and treatment.
- Tooth decay or failing fillings that trap food and bacteria, which may need restorative treatment.
- Dry mouth, often linked to medications, mouth breathing or dehydration. Saliva naturally rinses bacteria away, so less saliva means more odour.
- Coated tongue, where bacteria collect on the back of the tongue.
- Diet, smoking and alcohol, which affect both odour and saliva flow.
- Medical causes such as sinus infections, tonsil stones, reflux or other conditions. If your mouth is healthy and bad breath persists, we may recommend seeing your GP.
How We Find the Cause
At your examination we assess your teeth, gums and tongue, check for decay, failing restorations and gum pocketing, and talk through your diet, medications and daily habits. Digital imaging can reveal hidden decay or infection that is not visible in the mirror. Identifying the actual source matters, because masking odour with mouthwash does not treat the cause.
Treatment and Prevention
Treatment depends on the cause. It may include a professional clean, gum treatment, repairing decayed teeth, or advice on managing dry mouth. At home, brush twice daily, clean between your teeth every day, clean your tongue with a scraper or soft brush, drink water regularly and limit smoking and alcohol. Most patients notice a significant improvement once the underlying cause is addressed, although results vary between individuals.
Frequently Asked Questions
Why do I still have bad breath after brushing?
Brushing alone cleans only some of the tooth surfaces in your mouth. Odour causing bacteria commonly sit between teeth, under the gums and on the tongue. If brushing is not resolving it, a dental assessment can locate the source.
Does mouthwash cure bad breath?
Mouthwash can temporarily mask odour and reduce bacteria, but it does not remove tartar, treat gum disease or repair decay. It is best used alongside treatment of the underlying cause, not instead of it.
Can other people tell if I have bad breath?
It is difficult to smell your own breath accurately. If you are concerned, ask someone you trust, or simply raise it at your next appointment. It is a common concern and nothing to be embarrassed about.
When should I see a dentist about bad breath?
If bad breath persists for more than a week or two despite good home care, book an assessment. Persistent halitosis is often the first noticeable sign of gum disease or hidden decay, and earlier treatment is usually simpler.
Important Information
This page provides general information only and is not a substitute for professional dental advice. Treatment suitability, results and costs vary between patients.
A consultation with one of our dentists is required to assess whether this treatment is appropriate for you. Book a consultation or call 08 9256 2588.
References & Further Reading
This page is based on current clinical literature and guidelines from recognised Australian and international dental and health authorities.
- Australian Dental Association. ada.org.au
- Dental Board of Australia (AHPRA). dentalboard.gov.au
- Australian Periodontology - ADA Oral Health Topics. ada.org.au/Dental-Professionals/Publications/Oral-Health-Topics
- Australian Dental Association - Teeth.org.au Oral Health Advice. teeth.org.au
Content reviewed by Dr Desmond Ng, BDSc (Hons) University of Queensland | Principal Dentist, Dentists at Canning Vale. Last reviewed July 2026.