Bad Breath (Halitosis)
Common causes of bad breath and how to fix them.
Persistent bad breath usually stems from oral bacteria, gum disease or decay rather than diet alone.
Causes & Solutions
Treating gum disease, decay and improving hygiene resolves most cases.
Prevention
Brushing, flossing, tongue cleaning and regular check-ups help.
Where the Smell Comes From
In the large majority of cases — roughly 85–90% — the source is in the mouth, and specifically bacteria producing volatile sulphur compounds. The three usual origins are the coating on the back of the tongue, gum disease, and a dry mouth.
Mouthwash masks these for twenty minutes. It treats none of them.
Start With the Tongue
The rough back third of the tongue harbours the greatest bacterial load in the mouth. Most people never clean it. Use a tongue scraper — not a toothbrush — from as far back as you can tolerate, drawing forward, once daily. For many people this alone resolves the problem.
If your gums bleed, treat that too: periodontitis produces exactly these compounds in deep pockets, where no brush reaches.
Dry Mouth: The Overlooked Cause
Saliva is antibacterial and washes debris away. Reduce it and odour rises. Causes: mouth breathing and snoring (hence morning breath, which is normal), dehydration, alcohol, smoking, and — very commonly — medication: antidepressants, antihistamines, blood pressure drugs, diuretics.
Sip water, chew sugar-free gum to stimulate saliva, limit alcohol and caffeine, and ask your doctor whether an alternative medication exists.
When It Is Not the Mouth
In the remaining minority, look further: sinusitis and post-nasal drip; tonsil stones; gastro-oesophageal reflux; poorly controlled diabetes (a sweet, acetone odour); and, rarely, liver or kidney disease.
The distinguishing feature is that meticulous oral hygiene and tongue cleaning do not change it. That is the point to see a doctor rather than buy stronger mouthwash.
A Protocol That Works
Clean between the teeth daily with interdental brushes. Scrape the tongue daily. Treat gum disease. Keep hydrated. Rinse with water after coffee, alcohol and dairy. Replace mouthwash containing alcohol — it dries the mouth and worsens the problem — with a bacteria-targeting rinse if one is recommended.
And check the obvious: an old, leaking filling, a failing crown margin, or food packing under a bridge will defeat every rinse ever made. See professional cleaning.
This page provides general information and does not replace professional dental advice. Always consult a qualified dentist about your individual case.
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