Bad Breath (Halitosis): Causes and Lasting Treatment (2026)

For an immediate reduction in odour:

1. Tongue scraper — clean the back of the tongue (most important!)
2. Saltwater rinse — 1 cup of warm water with 1 teaspoon of salt
3. Plenty of water — dry mouth is the most common trigger
4. Floss — remove food debris from between the teeth
5. Sugar-free gum (short term)

For a lasting solution:

• Professional scale and polish
• Treatment of gum disease
• Fillings for decay
• Treatment of the cause of dry mouth

1. Bacterial Build-Up on the Tongue (the most common — over 50%)

The papillae (rough surface) at the back of the tongue is an ideal environment for bacteria and dead cells. These bacteria produce volatile sulphur compounds (VSCs), which cause the odour.

Solution: Clean the back of the tongue twice a day with a tongue scraper or your toothbrush.

2. Periodontal (Gum) Disease

Gingivitis and periodontitis increase VSC production. Bacteria in the gum pockets cannot be reached with a toothbrush.

Symptoms:

• Bleeding gums
• Swelling and redness
• A bad taste between the teeth
• Persistent odour

Solution: Scale and polish plus gingivitis treatment.

3. Decayed Teeth

Cavities harbour bacteria. Deep cavities that trap food produce an especially strong odour.

Solution: An early filling, or root canal treatment if needed.

4. Dry Mouth (Xerostomia)

Saliva is a natural antibacterial and cleanser. In dry mouth, bacterial control is lost.

Causes:

• Medication side effects (antidepressants, antihistamines, diuretics)
• Smoking
• Mouth breathing (during sleep)
• Diabetes
• Sjögren's syndrome
• Excess caffeine or alcohol

Solution: Plenty of water, sugar-free gum to stimulate saliva, or a medication review with your doctor. See also: Dry mouth causes and treatment.

5. Diet

Foods that worsen odour:

• Garlic and onion (sulphur compounds reach the lungs; odour persists for 24–48 hours)
• Coffee and alcohol (cause dryness)
• Sugary snacks (feed bacteria)
• High-protein / low-carbohydrate diets ("ketone breath")
• Strongly spiced foods (garlic, curry, etc.)

Solution: Avoiding strongly scented foods helps in the short term, but proper after-meal care matters more.

6. Smoking and Alcohol

Smoking causes bad breath in two ways — directly and indirectly:

• The smell of nicotine itself
• Doubles or triples the risk of gum disease
• Causes dry mouth

Alcohol causes dehydration and dry mouth.

7. Sinus and Throat Infections

Tonsillitis, tonsil stones, sinusitis and pharyngitis are common systemic causes. Tonsil stones are white-yellow, pinhead-sized and produce a strong odour.

Solution: ENT consultation.

8. Gastric Reflux

When stomach contents rise into the mouth (GORD), chronic bad breath can result.

Symptoms:

• Sour taste after meals
• Heartburn
• Throat irritation
• Morning breath

Solution: Gastroenterology review plus PPI treatment.

9. Systemic Illnesses

Some illnesses produce characteristic odours:

• Diabetes — acetone / fruity odour (may indicate DKA — an emergency!)
• Kidney failure — ammonia / urine-like odour
• Liver failure — musty / fishy odour
• H. pylori infection — gastric source

Solution: Medical treatment.

10. Poor Oral Hygiene

Irregular brushing, not flossing and never having a professional clean compound all the other causes.

Solution: Proper tooth brushing techniques and daily flossing.

True halitosis: breath with an objectively detectable odour (high VSCs).

Halitophobia: the person believes they have bad breath but objectively they do not. It can be linked to anxiety or obsessive-compulsive disorder.

How to tell:

• Ask someone close to you (partner, family) — an objective assessment
• Scrape the tongue and smell the scraper
• A dentist can measure VSCs with a halimeter

A 7-day lasting-solution programme:

Daily Routine

1. Morning: Tongue scraping after breakfast, followed by brushing and flossing
2. Midday: Rinse with water after lunch
3. Evening: Full routine plus chlorhexidine mouthrinse (short term, 1 week)
4. Plenty of water — at least 8 glasses a day

Weekly

• Floss or use an interdental brush — once a day
• Rotate oral-care products (avoid relying on breath fresheners)

Every 3 Months

• Dental check-up
• Scale and polish if needed

What Not to Do

• ❌ Constant gum or mints (temporary — they mask the problem)
• ❌ Strong alcohol-based mouthrinses (cause dry mouth)
• ❌ Short brushing (brush for at least 2 minutes)
• ❌ Ignoring the tongue (the most important area!)

• Persistent odour (more than a week, despite a home routine)
• Along with bleeding gums
• Unusual sour / ammonia / fruity breath on waking (a systemic clue)
• Unexplained weight loss alongside
• Headaches or fever alongside

Start with your dentist → referral to ENT or internal medicine if needed.

For more on oral health and breath:

• Dry Mouth Causes and Treatment — A leading cause of bad breath
• Dental Scaling and Cleaning — Professional cleaning
• Gingivitis Treatment
• Bleeding Gums Causes
• Proper Tooth Brushing Techniques — Modified Bass + tongue cleaning
• Dental Abscess Treatment — Acute infection causing odour
• Tooth Decay Treatment — Decay-related odour

1. Porter SR, Scully C. Oral malodour (halitosis). BMJ. 2006;333(7569):632-635. PubMed
2. Aylıkcı BU, Çolak H. Halitosis: From diagnosis to management. J Nat Sci Biol Med. 2013;4(1):14-23. PubMed
3. Van den Broek AM, Feenstra L, de Baat C. A review of the current literature on aetiology and measurement methods of halitosis. J Dent. 2007;35(8):627-635. PubMed

Concerned about bad breath? At Derya Dental Clinic in Maltepe we offer objective VSC measurement with a halimeter, periodontal assessment and a tailored treatment plan — including professional tongue-cleaning technique.

📞 0216 572 05 20 💬 WhatsApp appointment

This content is for informational purposes only and does not replace medical diagnosis or treatment. Please consult a specialist for decisions about your oral and dental health.