How to Get Rid of Bad Breath

Bad breath, called halitosis, is common and usually fixable. For most people it comes from bacteria on the tongue and between the teeth, not from the stomach. This guide covers how to clear it and when it points to something a dentist should check.

The short version

• Most bad breath starts with bacteria on the tongue and between the teeth.
• Clean your tongue, floss daily, and stay hydrated. This clears most cases.
• Mints only mask the smell. Sugar-free gum is better because it boosts saliva.
• Breath that persists despite good hygiene can signal gum disease or a cavity.
• See a dentist if it lasts more than two weeks despite good home care.

Steps to clear bad breath

The most reliable fix is cleaning the whole mouth, not just the teeth. Brush, floss between the teeth, and clean the tongue, where most odour-causing bacteria live. Drinking water through the day rinses away food and bacteria. These steps clear most everyday bad breath.

1. Clean your tongue every time you brush, reaching toward the back with a scraper or your brush.
2. Floss once a day to remove food trapped between the teeth.
3. Drink water regularly through the day. A dry mouth builds up odour fast.
4. Chew sugar-free gum after meals to boost saliva. Skip sugary mints, which feed the bacteria.

Garlic and onion are a special case. Their smell comes through the lungs as the food digests, so brushing will not fully clear it until the food works through your system.

Why does breath smell even after brushing?

Breath that stays bad despite good brushing usually points to one of three things: bacteria between the teeth or under the gums, a dry mouth, or a dental problem such as gum disease or a cavity. Brushing alone misses the gaps between teeth and the back of the tongue, which is where most of the smell starts.

• Between the teeth and on the tongue: flossing and tongue cleaning reach where a brush cannot.
• Dry mouth: less saliva means more buildup, common with some medications, mouth breathing, and low water intake.
• Gum disease or a cavity: deep gum pockets and decay trap bacteria out of a brush’s reach and need a dentist.

Dry mouth and morning breath

Saliva is the mouth’s natural rinse, so anything that dries the mouth makes breath worse. That is why morning breath is normal: saliva slows overnight and bacteria build up while you sleep. Medications, mouth breathing, alcohol, and caffeine all reduce saliva.

The fixes are simple. Sip water through the day, chew sugar-free gum to trigger saliva, and ease off coffee and alcohol. If a medication causes the dry mouth, do not stop it. Ask a dentist or doctor about a saliva substitute instead.

Can gum disease cause bad breath?

Yes. Gum disease is one of the common causes of persistent bad breath. Bacteria collect in pockets between the gums and teeth, out of a brush’s reach, and give off a steady odour. Bleeding or tender gums alongside the smell point toward gum disease.

Early gum disease, called gingivitis, is reversible with better cleaning at home and a professional cleaning. Left alone it can progress and damage the bone that holds the teeth. The bad breath is an early warning worth acting on.

When to see a dentist

See a dentist if bad breath lasts more than two weeks despite good brushing, flossing, and tongue cleaning. Persistent halitosis usually means the source is somewhere a brush cannot reach, such as gum pockets, a cavity, or hardened tartar. A cleaning and exam can help find and remove it.

Rarely, breath that smells fruity, fishy, or otherwise unusual can point to something outside the mouth, such as a sinus infection, acid reflux, or diabetes. If a dentist rules out a dental cause, a visit to your family doctor is the next step.