Bad breath (dentists call it halitosis) affects everyone at least occasionally — and many people in silence, not daring to bring it up. The good news: in the vast majority of cases it comes from the mouth itself, which means the right routine is enough to neutralise it. Here are the real causes, the false solutions, and the plan of action.
Where does bad breath come from?
The main culprit: bacteria that break down food residue and dead cells, releasing volatile sulphur compounds — the ones that smell of eggs or cabbage. They thrive:
- on the tongue, especially towards the back, in its whitish coating;
- between the teeth, where the brush never reaches;
- under the gum line when plaque builds up;
- in a dry mouth: saliva is your natural cleanser — at night its production drops, hence morning breath, which is perfectly normal.
Add to that the occasional causes (garlic, onion, coffee, tobacco, fasting) and, more rarely, medical ones (ENT or digestive). If heavy breath persists despite impeccable hygiene, talk to your dentist and then your doctor.
The false solutions that mask without treating
- Chewing gum and mint sweets: a twenty-minute veil of mint over a bacterial problem — handy as a stopgap, useless as a treatment;
- Alcohol-based mouthwashes used repeatedly: alcohol dries the mouth out… and a dry mouth smells stronger afterwards;
- Brushing harder: bad breath cannot be scrubbed away, it is dislodged with method.
The routine that really neutralises it
- Two two-minute brushings a day, gum line included, with a fluoride toothpaste that combines cleaning power and real freshness — that is the job of our Classic Mint, with its clean mint and 1450 ppm fluoride;
- The tongue too: gentle brushing from back to front, or a tongue scraper, removes the coating where the sulphur-producing bacteria live;
- Interdental cleaning in the evening: floss, interdental brushes or a water flosser — the spaces between your teeth account for a huge share of the surfaces to clean;
- Water throughout the day: a hydrated mouth is a mouth that cleans itself;
- Regular scaling at the dentist to remove established tartar, a favourite hideout for bacteria.
The discreet test: lick the inside of your wrist, let it dry for five seconds, then smell it. It is far more reliable than breathing into your hand.
Rushed morning, big evening: the emergency kit
Alongside your core routine: a quick brush (even 60 seconds beats nothing), a large glass of water, and if needed a sugar-free chewing gum to stimulate saliva — not to mask. Coffee on an empty stomach and a cigarette right before a meeting are, for their part, the two classic traps.
Timing matters too: we explain the best time to brush your teeth.
When the routine is not enough: the leads your dentist follows
You have kept up the full routine for three weeks — brushing, tongue, between the teeth, water — and the smell persists. At that point it is no longer a matter of hygiene but of cause, and the appointment does not boil down to "brush better". The dentist first probes the gums: a periodontal pocket, that gap deepening between tooth and gum, shelters bacteria that neither brush nor floss reach, and it is the leading cause of breath that will not go away. Our article on bad breath of gum origin explains how to recognise it. Then the teeth themselves: a hidden cavity, a crown whose edge traps food, a half-erupted wisdom tooth under which everything gets stuck.
If the mouth is healthy, the investigation moves upstream. The tonsils first: their folds sometimes hold small whitish, foul-smelling clumps that come loose when coughing — an ENT doctor spots them at a glance. Then dry mouth, very often linked to a medication: antihistamines, antidepressants and blood-pressure treatments are among the usual suspects, and our article on dry mouth gives the habits that compensate. Further still, reflux, chronic sinusitis or poorly controlled diabetes can give breath a particular note that a doctor knows how to interpret. The "smelly stomach", on the other hand, is a myth: the oesophagus is closed at rest, and breath almost never comes from digestion.
One last case deserves a name: imaginary halitosis. Some people are convinced they smell bad when nobody around them notices anything — and the wrist test does not reassure them. The only way to settle it is to ask a close friend or relative frankly, or the dentist, who has an objective view and instruments to confirm it. Knowing you are odour-free is sometimes more freeing than a new tube.
FAQ — bad breath
Why do I have bad breath in the morning even though I brush at night?
Saliva production drops during sleep: bacteria work all night without being rinsed away. It is normal and it disappears with your morning brushing.
Is toothpaste enough against halitosis?
It is the foundation, but the winning trio is brushing + tongue + interdental cleaning. Breath that stays heavy despite this complete routine deserves a professional opinion.
Are strong mint toothpastes better against bad breath?
Mint provides the sensation of freshness, but it is the cleaning (fluoride, action on plaque, consistency) that tackles the cause. Ideally: both in the same tube.
Read also: Bad breath: the real causes and what works
Which foods cause bad breath?
Garlic, onion and some spices release sulphur compounds that pass into the blood and then into exhaled air for several hours: brushing does not remove them, you have to wait. Coffee and alcohol dry out the mouth, which favours the bacteria involved. Drinking water and chewing sugar-free gum help to restart saliva.
How do you get rid of bad breath quickly?
Right now: brush your teeth and above all your tongue, where most of the bacteria involved live, floss, drink a large glass of water and chew sugar-free gum to restart saliva. It is a fix that lasts a few hours. If bad breath returns every day despite a good routine, the cause should be looked for with the dentist.
Read also: Oral probiotics: what are they really worth?
How do you treat bad breath for good?
By tackling its source, not its smell: brushing twice a day, cleaning the tongue, the spaces between the teeth every evening and a mouth that stays hydrated. Mints and sprays mask it for a few minutes without treating anything. If your breath still smells after three weeks of a steady routine, your dentist looks for a gum or medical cause.
In summary
Bad breath is 90 % decided in the mouth, and it is won with a complete routine rather than with minty tricks. Every profile has its ideal toothpaste — intense freshness, stain removal, gentleness: our personalised quiz tells you which one is made for you. And so you never run out of tube, the Club Éclat+ delivers it to you automatically.