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Dental guide · Part of our Scaling and Polishing guide

Bad Breath: Causes, Treatment and When to See a Dentist

Bad breath usually comes from the mouth itself: bacteria on the teeth, gums and tongue, gum disease or decay. Good cleaning, including the tongue and between the teeth, sorts out most cases. If it lasts more than a few weeks despite that, see a dentist.

Medical facts checked 16 October 2026 against the sources at the end. Published by Dental Plus, Bahria Town, in practice since 1984.

Key points

  • Most bad breath starts in the mouth
  • Clean your teeth, between them and your tongue every day
  • Gum disease and decay are common hidden causes
  • See a dentist if it lasts beyond a few weeks of good cleaning

Common causes of bad breath

The NHS lists these:

  • Strong-smelling or spicy food and drink
  • Gum disease
  • Holes in teeth or an infection
  • A dry mouth
  • Fasting or crash dieting
  • Smoking
  • Tonsillitis or acid reflux

How to treat bad breath yourself

The NHS suggests:

  • Gently brush your teeth and gums at least twice a day for 2 minutes, with fluoride toothpaste
  • Clean your tongue every day with a tongue scraper or cleaner
  • Clean between your teeth every day with interdental brushes or floss
  • Use sugar-free mints or gum after strong-smelling food
  • Cut down on sugary food and drink, don't smoke, and don't rinse with water straight after brushing

How a dentist can help

If bad breath comes from tartar build-up or early gum disease, a scale and polish removes the hardened deposits that brushing can't, and your dentist will check for decay or infection that could be the source. If the mouth is healthy, the cause may be elsewhere, such as the throat or stomach, and your dentist may suggest seeing a doctor.

How Dental Plus can help

A check-up and professional clean at Dental Plus is often the quickest fix. We look for gum disease and decay at the same visit. See teeth cleaning.

Book on WhatsApp Call 0306 5574644

Common questions

Does mouthwash cure bad breath?

An antibacterial mouthwash can help, but it only masks the smell if the cause is gum disease or decay. Cleaning between the teeth and the tongue matters more.

Can a scale and polish help bad breath?

Often, yes. It removes hardened tartar and the bacteria trapped around it, which brushing alone cannot shift.

Why do I have bad breath even after brushing?

Bacteria on the tongue and between the teeth are often missed. Clean your tongue and between your teeth daily. If it continues, see a dentist.

Sources

Checked on 16 October 2026. This guide is general information, not a diagnosis. If you are worried, see a dentist.