Bad breath, also known as halitosis, is extremely common. Most people experience it occasionally, especially after eating certain foods, waking up in the morning, or going for a long period without brushing.

However, persistent bad breath can sometimes be a sign that something needs attention.

The good news is that in many cases, bad breath can be improved with some simple changes to your oral hygiene routine. When the problem continues despite good oral hygiene, it may be worth discussing with your dentist.

There are several possible causes of bad breath, but the most common source is the mouth itself.

When we don’t brush and floss regularly, food particles and bacteria can accumulate around the teeth and gums. Bacteria break down these particles and produce unpleasant-smelling compounds.

Plaque buildup can also contribute to bad breath, particularly when it is allowed to accumulate along the gumline.

Regular brushing, flossing, and professional dental cleanings are important for keeping these bacteria under control.

Your tongue can be an overlooked source of bad breath. The surface of the tongue contains many small grooves and structures where bacteria, food particles, and debris can accumulate.

Even if you brush your teeth thoroughly, bacteria on the tongue can continue to contribute to an unpleasant odor.

Gently brushing your tongue or using a tongue scraper can help remove some of this buildup.

Persistent bad breath can be a warning sign of gum disease.

Gum disease occurs when bacteria and plaque build up around the gums. As the condition progresses, the bacteria can move deeper beneath the gumline and create areas that are difficult to clean with normal brushing and flossing.

Other signs of gum disease can include:

If you are experiencing bad breath along with any of these symptoms, a dental examination is recommended.

Cavities can sometimes contribute to bad breath, particularly when food and bacteria become trapped in areas of decay.

More significant dental infections can also produce an unpleasant taste or odor. An infected tooth may or may not be painful, so the absence of pain does not necessarily mean that everything is healthy.

If you have a persistent bad taste, swelling, drainage, or an unpleasant odor coming from a particular area of your mouth, you should have it evaluated by a dentist.

Saliva plays an important role in keeping your mouth clean. It helps wash away food particles and bacteria.

When saliva production decreases, bacteria and debris can build up more easily, which can lead to bad breath.

Dry mouth can be caused by dehydration, certain medications, mouth breathing, tobacco use, and a variety of medical conditions.

Drinking plenty of water throughout the day can help. If you frequently experience dry mouth, talk with your dentist or physician about possible causes.

Certain foods can temporarily cause bad breath. Garlic, onions, and some spices contain compounds that can produce noticeable odors.

Coffee and alcohol can also contribute to bad breath, in part because they can contribute to dry mouth.

In these situations, the odor is generally temporary and should improve once the food or drink has been cleared from the mouth and normal saliva flow returns.

Smoking and other tobacco products can contribute to persistent bad breath. Tobacco can dry out the mouth and promote the accumulation of bacteria and plaque.

More importantly, tobacco significantly increases the risk of gum disease and oral cancer.

Quitting tobacco is one of the best things you can do for both your oral health and your overall health.

If bad breath is caused by something in your mouth, improving your daily oral hygiene routine is a great place to start.

Brush your teeth for approximately two minutes twice a day using fluoride toothpaste. Make sure to gently brush along the gumline where plaque tends to accumulate.

Brushing cannot effectively clean between your teeth. Flossing or using another type of interdental cleaner every day helps remove food and plaque from areas your toothbrush cannot reach.

Gently brushing your tongue or using a tongue scraper can help reduce the bacteria and debris that accumulate on its surface.

Drinking water throughout the day helps maintain saliva flow and can help wash away food particles and bacteria.

Professional dental cleanings remove plaque and hardened tartar that cannot be removed with regular brushing and flossing at home.

Your dentist can also check for cavities, gum disease, infections, and other conditions that may contribute to persistent bad breath.

Mouthwash can be a useful addition to your oral hygiene routine, but it should not be considered a replacement for brushing and flossing.

Some mouthwashes primarily mask odors temporarily, while others contain ingredients designed to reduce certain bacteria. If bad breath is caused by gum disease, cavities, an infection, or another dental problem, mouthwash alone will not address the underlying cause.

Think of mouthwash as an addition to good oral hygiene—not a substitute for it.

Occasional bad breath is normal. However, if your bad breath continues despite brushing, flossing, cleaning your tongue, and maintaining good oral hygiene, it is worth having your mouth examined.

Persistent bad breath can sometimes be associated with gum disease, cavities, infections, dry mouth, or other oral health problems.

Your dentist can help determine whether there is an underlying dental cause and recommend the appropriate treatment.

Bad breath is common, but persistent bad breath shouldn’t simply be something you have to live with. In many cases, improving your brushing and flossing routine, cleaning your tongue, staying hydrated, and maintaining regular dental visits can make a significant difference.

If your bad breath doesn’t improve with good oral hygiene—or if you also have bleeding gums, tooth pain, swelling, a persistent bad taste, or other changes in your mouth—schedule an appointment with your dentist to determine what may be causing it.

A healthy mouth should feel good, look good, and smell good. If something doesn’t seem right, we’re here to help.