Aspen Dental dentist consulting a patient about denture stomatitis symptoms during an in-office exam.
03.25.2025

Denture stomatitis: causes, treatment and prevention 

Understand denture stomatitis—its causes, symptoms, and how to prevent it for your healthiest smile.

Aspen Dental dentist consulting a patient about denture stomatitis symptoms during an in-office exam.

If you’re struggling with redness or discomfort under your dentures, you could be dealing with denture stomatitis. It’s a common, but often overlooked, fungal infection. But the good news is that it’s treatable and even preventable. 

If you’re experiencing symptoms or simply want to learn more about this condition, read on to learn tips to keep your smile healthy and your dentures in top condition in this quick guide. 

If you think you might have denture stomatitis or just want to learn more, schedule an appointment at Aspen Dental today. 

Senior patient smiling with relief after a denture stomatitis evaluation at Aspen Dental, holding a mirror in the dental chair.

What is a denture stomatitis? 

Denture stomatitis, also known as oral thrush, is a yeast infection in the mouth caused by a fungus called Candida. It can happen to people who wear dentures, but it can also affect others. While it can be uncomfortable, it’s not contagious and is usually easy to treat. 

Denture stomatitis is categorized into 3 types based on how severe it is:

Aspen Dental patient being examined while a chart explains Newton’s three types of denture stomatitis from mild to severe.


  • Newton Type 1: The mildest form, showing small, localized red areas in the mouth. 

  • Newton Type 2: More advanced, with widespread redness covering larger areas under the dentures. 

  • Newton Type 3: The most severe, often resulting in a granular, inflamed texture in the affected areas. 


This classification helps your dentist choose the right treatment based on how far the condition has progressed. 

If you’re experiencing discomfort or redness in your mouth, schedule an appointment with your dentist at Aspen Dental as soon as possible or walk-in that same day.  

Aspen Dental professional inspecting dentures for proper hygiene, helping prevent denture stomatitis through regular care.

9 common causes of denture stomatitis 

Denture stomatitis often comes down to lifestyle or hygiene habits. Here are some of the most common reasons why it can happen: 

  • Not keeping up with oral hygiene

  • Having a dry mouth

  • Lacking certain nutrients or vitamins

  • Smoking

  • Wearing dentures while you sleep

  • Dentures that don’t fit properly

  • Health conditions like diabetes

  • Using antibiotics for a long time

  • A weakened immune system 


Symptoms of denture stomatitis

Denture stomatitis can show up in different ways, from subtle changes to more noticeable symptoms. Some common signs to look out for are:  

Close-up of inflamed gums with a list of common denture stomatitis symptoms including sores, swelling, and bad breath.

Sores and cracked skin

You might notice dry, cracked skin in the corners of your mouth. In more serious cases, canker sores could also appear. 

Pain

This condition can cause discomfort and inflammation, especially when swallowing. That’s because it often leaves your mouth feeling dry and swollen. 

Swelling

Bacteria and yeast can build up under poorly fitting dentures, leading to unpleasant odors and bad breath. 

Bad breath

It’s common to experience swelling, along with tenderness and redness underneath the dentures. If it gets worse, the swelling could eventually lead to bleeding. 

Red or white patches on the tongue or inside the mouth

Red or white patches might pop up on your tongue, gums, inner cheeks, lips or the roof of your mouth. These patches are a common sign of denture stomatitis. 

Dentures that don’t fit quite right

If your dentures suddenly don’t fit as well as they used to, it could be due to the ongoing inflammation and soreness caused by stomatitis. 

Aspen Dental care team warmly greeting a patient before discussing denture stomatitis treatment options and oral health needs.

What are my treatment options?

Treating this infection depends on how serious the condition is. Common treatments include antifungal medications, lozenges, laser therapy or even taking your dentures out for a while. 

In some cases, oral surgery may be advised, however, if you’re worried about denture stomatitis, schedule an appointment at Aspen Dental today. 

How can I prevent denture stomatitis

Here are 3 simple tips to help reduce the risk of denture stomatitis: 

Avoid smoking and vaping 

Smoking and vaping can irritate your mouth, weaken your immune system, and make infections more likely. If you smoke or vape, try to quit if you can. 

Proper care and cleaning of dentures 

Clean your dentures every day with a soft-bristled toothbrush to remove food particles and plaque that can trap yeast and bacteria. Make sure to soak your dentures in a denture cleaner overnight to keep them fresh and clean. Don’t ever sleep with your dentures in overnight, as this could lead to exacerbate the infection.

Routine dental check-ups 

Seeing your dentist regularly is key to staying on top of your oral health. Your Aspen Dental care team can catch any issues early on, like denture stomatitis, saving you from bigger problems down the road.

Smiling Aspen Dental patient holding a mirror after successful treatment and relief from denture stomatitis symptoms.

Denture stomatitis FAQs

What is the most common cause of denture stomatitis? 

Denture stomatitis is often caused by a buildup of Candida, a fungus naturally found in the mouth. This usually happens due to poorly fitting dentures, not keeping up with good oral hygiene or sleeping with dentures in. 

What are the types of denture stomatitis? 

There are three types: Newton Type 1, Newton Type 2, and Newton Type 3. Newton Type 1 is the mildest form, while Newton Type 3 is the most severe. 

What happens if denture stomatitis is left untreated? 

If it’s not treated, denture stomatitis can lead to ongoing soreness and irritation in the mouth. It may also cause discomfort, cause bad breath and make your dentures fit poorly. 

What is the best treatment for denture stomatitis? 

Treatment depends on how severe the condition is and the individual’s oral health. Common options include antifungal medications, lozenges and even laser therapy. Your Aspen Dental care team can recommend the best solution for you. 

Prevent denture stomatitis today 

While denture stomatitis is a common and uncomfortable oral condition, it’s easily treatable and preventable with the right care. If you notice pain, sores, cracked skin or other symptoms, don’t wait to schedule an appointment at Aspen Dental today. 

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