Bad breath happens to everyone. But when it sticks around no matter how often you brush, something deeper is usually going on. Knowing the causes of bad breath is where to start. From there, figuring out how to get rid of bad breath becomes more straightforward.
What Causes Bad Breath?
Bad breath rarely has one single explanation. It usually comes down to bacteria, dryness, or an underlying issue in the mouth or body. Here are nine common reasons it tends to linger.
1. Poor Oral Hygiene
When brushing and flossing are inconsistent, bacteria accumulate on teeth, gums, and the tongue. These bacteria produce sulphur compounds, which are the main drivers of persistent bad odour.
2. A Coated Tongue
The tongue’s surface readily traps food particles and bacteria. Most people focus on their teeth and forget about the tongue entirely, making this one of the most overlooked causes.
3. Dry Mouth
Saliva plays a key role in keeping the mouth clean. Certain medications, mouth breathing, and dehydration can all reduce saliva flow, allowing bacteria to multiply and odour to build up.
4. Gum Disease
Infection in the gums creates pockets where bacteria thrive. Gum disease is a major cause of bad breath that does not respond to brushing or mouthwash and often has no obvious pain in its early stages.
5. Tooth Decay or Cavities
Cavities are essentially bacterial damage. The decay creates spaces that trap food and are difficult to clean, producing a smell that worsens over time without treatment.
6. Old or Damaged Dental Work
Fillings and crowns that have worn down or no longer fit properly can collect bacteria in the gaps. Ageing dental work is worth checking if nothing else explains the problem.
7. Tonsil Stones
Small deposits can calcify in the tonsillar crevices. Many people are unaware they have them, yet tonsil stones are a surprisingly frequent source of persistent bad breath.
8. Diet
High-protein, low-carbohydrate diets cause the body to produce ketones, which can be noticeable in breath. Garlic and onions also contribute, though their effect is usually temporary.
9. Underlying Health Conditions
Acid reflux, sinus infections, and some metabolic conditions can all cause breath issues. Understanding what causes bad breath in these cases requires looking beyond the mouth altogether.
How HD Dental Studio Can Help
A dentist is the most reliable starting point for anyone looking for how to get rid of bad breath. Mouthwash and mints mask the smell but do not address the source.
At HD Dental Studio, a thorough dental check-up will identify the underlying cause of the problem. Whether it is gum disease, dry mouth, or something less obvious, our team can assess the full picture and recommend the right treatment. For causes of bad breath that point to a non-dental issue, we will refer you to the right specialist.
Book your dental check-up at HD Dental Studio today.
Dr Daniel Hu is a general dentist with over 10 years of clinical experience, practising in Southeast Brisbane since completing his dental qualifications. Born and raised on Brisbane’s southside, he completed all his schooling locally before relocating to the Gold Coast to study dentistry at Griffith University.
