Burning Mouth Syndrome can be one of the most frustrating oral conditions a patient experiences.

The mouth may look completely healthy. There may be no obvious infection, ulcer, broken tooth, or visible inflammation. Yet the patient may describe persistent burning, tingling, numbness, altered taste, or a sensation that the tongue or other oral tissues have been scalded.

For some patients, these symptoms persist for months or even years.

As a dentist, I find Burning Mouth Syndrome particularly interesting because it reminds us that oral pain does not always originate from something we can see during a dental examination. Increasingly, research suggests that at least some cases of Burning Mouth Syndrome may involve abnormalities in the way the nervous system processes pain.

That has led researchers to investigate some unconventional possibilities including capsaicin, the naturally occurring compound responsible for the heat in chili peppers.

It sounds counterintuitive:

Could a substance that creates a burning sensation eventually help reduce burning pain?

Researchers have been asking exactly that question.

What Is Burning Mouth Syndrome?

Burning Mouth Syndrome(opens in new tab) is a chronic pain condition characterized by burning or uncomfortable sensations involving areas such as the tongue, lips, gums, palate, or sometimes much of the mouth.

Patients may describe:

• Burning or scalding sensations
• Tingling or numbness
• Altered or metallic taste
• Dry-mouth sensations
• Pain that changes throughout the day
• Symptoms occurring despite normal-looking oral tissues

One of the difficulties with BMS is that there isn’t necessarily a single cause.

Before I consider unexplained oral burning to represent primary Burning Mouth Syndrome, I believe it is important to investigate other possible explanations.

Nutritional deficiencies, dry mouth, medications, oral infections, allergies, hormonal factors, diabetes, reflux, dental materials, parafunctional habits and other medical or dental conditions may sometimes produce similar symptoms.

“Burning Mouth Syndrome should never simply become a label we give unexplained oral pain. My first priority is making sure we have carefully looked for dental, oral and medical conditions that could be contributing to what the patient is feeling.”

— Marielaina Perrone, DDS

That distinction matters because treating an identifiable underlying condition is very different from managing primary BMS.

Why Researchers Are Looking at the Nervous System

One of the most important developments in our understanding of BMS has been the growing evidence that the condition may involve neuropathic pain.

Neuropathic pain occurs when the nerves responsible for transmitting or processing sensory information do not function normally.

In other words, the problem may not necessarily be damaged tissue in the mouth.

It may involve the pain-signaling system itself.

Research involving BMS patients has investigated abnormalities involving peripheral sensory nerves, pain-processing pathways and areas of the brain associated with pain perception.

This helps explain something that otherwise seems puzzling:

A patient’s mouth can look completely normal while the burning sensation is very real.

That is an important point for patients.

An absence of visible disease does not mean an absence of pain.

“One of the most difficult things for patients with Burning Mouth Syndrome is being told that everything looks normal. A normal examination doesn’t mean the symptoms aren’t real. It tells us that we may need to look beyond the teeth and tissues themselves and consider how the nervous system is processing sensation.”

— Dr. Marielaina Perrone, DDS

The Norwegian Research Into Burning Mouth Syndrome

Researchers at the University of Oslo Faculty of Dentistry(opens in new tab) have investigated Burning Mouth Syndrome and its potential neurological mechanisms.

Research associated with Associate Professor Preet Bano Singh and collaborators has explored the relationship between BMS, neuropathic pain and altered sensory processing.

One avenue of investigation has involved something that initially seems almost paradoxical:

Capsaicin.

Capsaicin is the chemical compound responsible for the heat produced by chili peppers.

Yet capsaicin also has well-established effects on the sensory nerves responsible for detecting heat and pain.

That makes it scientifically interesting for researchers studying BMS.

Why Would Capsaicin Help a Burning Mouth?

Capsaicin interacts primarily with a sensory receptor called TRPV1, or transient receptor potential vanilloid 1.

TRPV1 receptors occur on sensory nerve fibers and respond to stimuli including heat and capsaicin.

When capsaicin initially activates these receptors, it produces the familiar sensation of heat or burning. But repeated or controlled exposure can alter the responsiveness of these pain-sensing nerve fibers.

This phenomenon is one reason capsaicin has been investigated for several forms of neuropathic pain. And it creates the seemingly contradictory possibility that:

A compound capable of producing burning may ultimately reduce certain types of burning pain.

That possibility has led investigators to explore whether capsaicin might eventually have therapeutic value for selected patients with BMS.

The Challenge: Getting Capsaicin to Stay Where It Is Needed

The mouth presents researchers with a unique drug-delivery problem.

Unlike medication applied to relatively stationary skin, anything placed inside the mouth must contend with:

Saliva.

Swallowing.

Tongue movement.

Speech.

Eating and drinking.

A medication placed on the tongue can therefore disappear relatively quickly.

That means researchers aren’t simply asking:

Does capsaicin affect the nerves involved in BMS?

They also have to ask:

How can we deliver it effectively and safely inside the mouth?

This is where the Norwegian research becomes particularly interesting. Researchers have explored specialized formulations capable of keeping capsaicin in contact with oral tissues long enough to potentially produce a therapeutic effect.

That requires expertise extending beyond dentistry into areas such as biomaterials, chemistry and pharmaceutical delivery systems.

Why Capsaicin Drops Are Scientifically Interesting

A successful oral capsaicin formulation would need to accomplish several things simultaneously.

It would need to remain in contact with the affected tissue long enough to work while controlling the amount of capsaicin delivered.

It would also need to minimize irritation and avoid damaging healthy oral tissues. And, perhaps most importantly, patients would actually have to tolerate it. That final issue shouldn’t be underestimated.

If the treatment itself creates an intolerable burning sensation, its theoretical effectiveness becomes much less meaningful clinically.

“There is an enormous difference between something showing biological potential and something becoming a practical treatment for patients. In dentistry, the treatment has to be effective, safe and tolerable. All three matter.”

— Dr. Marielaina Perrone, DDS

What Does the Research Mean for Patients Today?

This is where I think we need to be careful.

Research into capsaicin is fascinating, but emerging research should not be confused with established standard-of-care treatment.

Capsaicin is not a universal cure for Burning Mouth Syndrome, and patients should not interpret this research as a reason to begin putting concentrated capsaicin or hot-pepper preparations onto painful oral tissues themselves.

Doing so could significantly irritate the mouth. Instead, the importance of this research lies in what it may teach us about BMS itself.

If therapies targeting sensory nerve pathways can reduce symptoms, that provides additional evidence that neuropathic mechanisms may play an important role in at least some patients.

That knowledge could eventually help clinicians classify BMS more precisely and develop more targeted treatments.

Why Burning Mouth Syndrome Is So Difficult to Treat

One of the biggest challenges is that BMS probably isn’t identical in every patient.

Two people may describe almost identical burning sensations while having different contributing mechanisms.

One person’s symptoms might be associated with altered peripheral nerve function.

Another may have significant dry mouth.

Another may have medication-related symptoms.

Another may have nutritional or hormonal influences.

And some patients may have multiple factors occurring simultaneously.

That is why I don’t believe BMS should be approached with a simple:

“Here is the treatment for Burning Mouth Syndrome.”

The better question is:

“Why is this particular patient experiencing burning?”

That is a much more useful starting point.

Other Treatments Being Investigated for Burning Mouth Syndrome

Because BMS can be difficult to manage, researchers have explored numerous therapeutic approaches.

Depending upon the patient’s diagnosis and circumstances, the scientific literature has investigated approaches involving topical or systemic medications, clonazepam, alpha-lipoic acid, certain medications used for neuropathic pain, psychological interventions such as cognitive behavioral therapy, and other modalities.

Treatment of contributing conditions such as dry mouth or nutritional deficiencies may also be important when those conditions are present.

The evidence supporting individual treatments varies considerably, however.

There is currently no single treatment that works predictably for every patient. That is another reason individualized diagnosis is so important.

What About Botox for Burning Mouth Syndrome?

Another intriguing area of investigation involves botulinum toxin.

Botulinum toxin influences nerve signaling and the release of neurotransmitters involved in pain pathways. Small studies and clinical reports have therefore investigated whether it might reduce symptoms in certain patients experiencing neuropathic oral pain.

I’ve discussed this research separately in my article on Botox and Burning Mouth Syndrome(opens in new tab).

Like capsaicin, however, Botox should currently be viewed as an emerging area of investigation rather than a routine cure for BMS.

Further research is needed to establish which patients might benefit, appropriate treatment protocols, dosing, duration of benefit and long-term safety.

The Bigger Story Isn’t Really Capsaicin

This is perhaps the most important takeaway from the research.

Capsaicin itself is interesting.

But the larger story is what this research tells us about oral pain. Dentistry has traditionally been very good at identifying structural causes of pain.

We look for decay.

Cracks.

Infection.

Inflammation.

Periodontal disease.

Trauma.

Those remain enormously important.

But conditions such as Burning Mouth Syndrome remind us that pain can sometimes originate from abnormalities in sensory processing rather than visible tissue damage. That represents a very different way of thinking about oral discomfort. And it may ultimately lead to better treatment.

My Approach to a Patient With Unexplained Oral Burning

When someone comes to my Henderson dental office describing persistent burning, I don’t begin by assuming they have Burning Mouth Syndrome.

I begin by listening.

Where is the burning?

When did it begin?

Is it constant or intermittent?

Does it worsen during the day?

Has taste changed?

Does the mouth feel dry?

Have medications changed?

Are there new dental restorations?

Are there signs of infection, inflammation, trauma or irritation?

Those details can be extremely important.

A comprehensive oral examination can then help determine whether there is an identifiable dental or oral explanation. When appropriate, collaboration with physicians, oral medicine specialists or other healthcare professionals may also be necessary.

“Burning mouth symptoms require curiosity. Sometimes the most important finding during the examination is what we don’t see. That’s when the patient’s history, symptoms and the emerging science of neuropathic pain become especially important.”

— Marielaina Perrone, DDS

Frequently Asked Questions

Is capsaicin an approved cure for Burning Mouth Syndrome?

No. Capsaicin has been investigated as a potential treatment for BMS and other neuropathic pain conditions, but it should not be considered a guaranteed or universal cure.

Why would something spicy help burning pain?

Capsaicin activates TRPV1 sensory receptors. Repeated or controlled exposure can alter the responsiveness of certain pain-sensing nerve fibers, which is why researchers are interested in its potential role in neuropathic pain.

Should I try chili peppers or capsaicin products at home?

I would not recommend experimenting with concentrated capsaicin on painful oral tissues without professional guidance. Capsaicin can cause significant irritation and may worsen symptoms.

Is Burning Mouth Syndrome neurological?

Evidence suggests that neurological and neuropathic mechanisms may contribute to many cases of primary BMS. However, burning sensations can also occur secondary to other medical, dental or oral conditions.

Can Botox treat Burning Mouth Syndrome?

Botulinum toxin is being investigated as a possible therapy for certain neuropathic oral pain conditions, including BMS. Evidence remains limited, and additional clinical research is needed.

Can BMS occur when my mouth looks completely normal?

Yes. This is one of the defining challenges of primary Burning Mouth Syndrome. Patients may experience significant burning or abnormal sensations without obvious visible abnormalities.

The Future of Burning Mouth Syndrome Treatment

Burning Mouth Syndrome remains one of the more challenging chronic oral pain disorders, but our understanding of it is changing.

Research into capsaicin and TRPV1 receptors is particularly valuable because it moves the discussion beyond simply trying to suppress symptoms.

Researchers are asking a deeper question:

What is happening within the pain pathways themselves?

That distinction could ultimately change how BMS is diagnosed and treated.

I find this research encouraging—not because we suddenly have a cure, but because we are beginning to understand a condition that historically has been extraordinarily difficult for both patients and clinicians.

“The future of treating Burning Mouth Syndrome may come from understanding that oral pain isn’t always a problem with the tooth, tongue or gum tissue itself. Sometimes we need to understand the nerves carrying the message. Research like this brings us closer to doing that.”

— Dr. Marielaina Perrone, DDS

For patients who have lived with unexplained oral burning, that continued research represents something important:

A path toward better answers and hopefully, more predictable relief.

About Marielaina Perrone

Dr. Marielaina Perrone, DDS, is a trusted cosmetic and family dentist in Henderson, NV, known for helping patients achieve healthy, beautiful smiles through personalized, compassionate care. With more than 20 years of clinical experience, she combines advanced dental expertise with an artistic eye to deliver exceptional results in porcelain veneers, dental implants, smile makeovers, periodontal therapy, Botox, dermal fillers, and facial aesthetic treatments.

A graduate with honors from Stony Brook University School of Dental Medicine, Dr. Perrone remains committed to lifelong learning and regularly pursues advanced continuing education in cosmetic dentistry, implant dentistry, and facial aesthetics. Her comprehensive approach focuses on enhancing oral health, facial harmony, and overall confidence through customized treatment plans tailored to each patient’s unique goals.

Dr. Perrone is passionate about patient education, preventive care, and building lasting relationships founded on trust, communication, and comfort. She believes every patient deserves individualized attention and treatment that supports both long-term health and a confident smile.

Proudly serving Henderson, Green Valley, Las Vegas, Summerlin, and surrounding communities, Dr. Perrone is dedicated to providing modern, patient-centered dentistry in a welcoming environment. Outside the office, she enjoys cooking, staying active, spending time with family, and participating in community activities throughout the Las Vegas Valley.

Reviewed for Clinical Accuracy

This article has been written and clinically reviewed by Marielaina Perrone, DDS, to ensure it reflects current evidence-based dentistry and the personalized philosophy of care practiced at her Henderson, Nevada office.

Last Reviewed: August 2026