Why Does Sensodyne Burn My Mouth? Alarming Facts! 2023

Last Updated: 30 November 2023

Have you ever brushed your teeth and wondered, “Why does Sensodyne burn my mouth?”

You’re not alone.

Many people experience a surprising burning sensation when using certain toothpastes, especially those formulated for sensitive teeth like Sensodyne. 

This blog post is dedicated to unraveling this mystery. You will dive into the reasons why Sensodyne, despite being a go-to solution for tooth sensitivity, might leave your mouth feeling like it’s on fire.  

Did you know that certain ingredients in your toothpaste could be the culprits? Stay tuned as you explore this burning question, ensuring your next brush is both effective and comfortable. 

What is Sensodyne? 

Sensodyne is a well-known brand of toothpaste specifically designed for people with sensitive teeth. It has gained immense popularity worldwide due to its effectiveness in reducing tooth sensitivity and providing relief from pain associated with dental hypersensitivity. Sensodyne toothpaste is recommended by many dentists and is widely recognized for its specialized formulations that cater to sensitive teeth. 

Why Does Sensodyne Burn My Mouth? 

Sensodyne, a popular toothpaste brand known for its sensitivity relief, contains various ingredients that could contribute to a burning sensation in the mouth. The most common culprit is Sodium Lauryl Sulfate (SLS), a foaming agent used in many toothpastes. SLS can cause irritation in some individuals, leading to a burning feeling during and after brushing. 

According to Willey Contact Dermatitis, a 69-year-old atopic, retired painter presented with a 6-month history of cheilitis, characterized by lip crusts, intra-oral blisters, and red spots on the tongue, while using Sensodyne Rapid Relief toothpaste. His atopic condition and history as a painter suggest increased sensitivity to environmental factors, potentially including toothpaste ingredients.

The symptoms could be a reaction to components in the toothpaste, such as potassium nitrate. Discontinuing the toothpaste and switching to a different formulation is recommended to assess improvement and manage the condition. 

Findings: The patient’s oral symptoms, including cheilitis and intra-oral blisters, may be linked to an allergic reaction to ingredients in Sensodyne Rapid Relief toothpaste, exacerbated by his atopic background and occupational exposure to chemicals. (1) 

Common Causes of Mouth Burning Sensation  

Toothpaste is meant to clean and protect your teeth, but sometimes it can cause an unexpected burning sensation in your mouth. This sensation can be attributed to several factors, including your oral health condition and the specific ingredients used in the toothpaste. 

Sodium Lauryl Sulfate (SLS)  

One of the primary culprits behind the burning sensation is Sodium Lauryl Sulfate (SLS). SLS is a foaming agent used in many toothpastes, including some variants of Sensodyne. It helps in spreading the toothpaste evenly across your teeth but can irritate sensitive mouth tissues, leading to a burning feeling. However, studies suggest that SLS toothpaste may cause dry mouth and related conditions. Read more here: Can Sensitive Toothpaste Cause Dry Mouth?

Strong Flavorings  

Toothpastes often contain strong flavorings, such as mint or cinnamon, to provide a fresh, clean feeling. However, these intense flavors can sometimes be too harsh for people with sensitive mouths, resulting in a burning sensation. Sensodyne, known for its minty freshness, might trigger this reaction in some individuals. 

Whitening Agents  

Many toothpastes, including certain types of Sensodyne, contain whitening agents aimed at removing stains and brightening your smile. These agents, while effective, can sometimes cause irritation and a burning feeling, especially in those with sensitive gums or teeth. You know, some whitening toothpaste may cause tooth pain due to certain whitening agents.

Want A Graceful Smile without Painful Treatment?

Sensodyne Mouth Burning Effect – Customer Reviews

Following are some verified Sensodyne customers’ reviews from TrustPilot website.


SENSODYNE’s Gentle Whitening Toothpaste…



This was my second experience with the same Sensodyne “Gentle(😱 )Whitening” Toothpaste, first one was produced in The Middle East. Bought it at a pharmacy in Amman. A sticky liquid oozed out of it as I opened. Tried it after it began squeezing out normal looking. But IT SCARES ME OUT BECAUSE SOME AIR FRESHENERS IN PUBLIC PLACES OR SHOPS/EYE & HEARING TESTS CENTERS NEARLY CHOKE MY THROAT CAUSING DAYS OF COUGHING OUT MUCUS MAKING ME SUFFER FOR A WEEK IF I INHALED IT LONGER THAN A FEW MINUTES!


Date of experience: April 17, 2023

Source: Trustpilot

Sensodyne caused burning sensation in mouth - Customer reviews on TrustPilot


Pronamel burning sensation

“Regarding Pronamel, having used Sensodyne complete for a long time I tried the Pronamel; it wasn’t like normal toothpaste it was very watery and I got a strong burning sensation in my mouth. My husband tried a small dab on his tongue and had the same effect. I contacted customer service and spent about half an hour going over and over the same things. They asked me to return the product which I did in a pre-paid package they sent.

I expected they would send me a voucher for the cost of the toothpaste, but instead they keep asking me to fill in a form to enable them to have my medical records. I have tried to explain that neither of us have seeked medical advice but they still insist on having them. These are our private medical records with no information in them that could be of any use to them in this instance.

I rang them again to ask why they cant just send me a voucher and the snotty reply I got was that it is because they are a medical company (I though they were a chemical company). I could understand if we were taking them to court over it, I have now emailed the CEO and will update if I get anywhere, but I am not sure if they even look at this site as I cant see any replies.”

Date of experience: October 27, 2020

Source: Trustpilot

Sensodyne burning my mouth - Customer reviews on TrustPilot

Sensodyne-Specific Ingredients and Mouth Burning 

Following are the most common ingredients in Sensodyne that may cause burning mouth.

Potassium Nitrate

One of the key ingredients in Sensodyne is potassium nitrate. It is known for its desensitizing properties, which help alleviate tooth sensitivity.

However, in rare cases, some individuals may experience a burning sensation when potassium nitrate encounters sensitive areas in their mouth. This ingredient works by blocking nerve signals that transmit pain from the tooth to the brain.

In some cases, this nerve interference can lead to the perception of a burning sensation. 


Fluoride is another common ingredient found in Sensodyne and many other toothpaste brands. While fluoride is essential for strengthening tooth enamel and preventing cavities, excessive use or an allergic reaction to fluoride can result in mouth irritation and a burning feeling. There are some evidences that fluoride nay cause teeth sensitivity.

Flavoring Agents

Sensodyne toothpaste often comes in a variety of flavors, like mint or fresh citrus. While these flavors enhance the overall toothbrushing experience, some individuals with sensitive mouths may find them too intense. The combination of flavoring agents and Sensodyne’s desensitizing ingredients can sometimes create a burning sensation.  

Brushing Technique

In some cases, the way you brush your teeth can contribute to the burning sensation. Applying excessive pressure or brushing vigorously with Sensodyne can agitate sensitive areas in your mouth, causing irritation and that burning feeling. 

Tips for Reducing Mouth Burning Sensation from Sensodyne

Tips for reducing mouth burn sensation are as followed:

Opt for Gentle Brushing Techniques 

One of the primary reasons for mouth burning while using toothpaste is aggressive brushing. To reduce this discomfort, adopt a gentle brushing technique. Use a soft-bristle toothbrush and apply minimal pressure while brushing your teeth. Gentle, circular motions are more effective and less likely to irritate your mouth. 

Experiment with Different Toothpaste Formulations  

If Sensodyne or your current toothpaste is causing a burning sensation, consider switching to a toothpaste with a different formulation. Some toothpaste brands offer options designed for sensitive mouths, which may be gentler and less likely to trigger irritation. Look for toothpaste labeled as “sensitive” or “gentle” to find a better fit for your oral care needs. 

Consult with a Dentist 

If you consistently experience mouth burning while using toothpaste, it’s essential to consult with a dentist. They can examine your oral health and identify any underlying issues that might be contributing to the discomfort. Your dentist can also recommend specific toothpaste brands or formulations that are best suited for your unique dental needs. 

Reduce Toothpaste Quantity 

Sometimes, using too much toothpaste can lead to excessive foam and a burning sensation. Remember that a pea-sized amount of toothpaste is sufficient for effective cleaning. Using less toothpaste can help reduce the foam and irritation during brushing. 

Rinse Thoroughly 

After brushing your teeth, make sure to rinse your mouth thoroughly with water. This helps remove any lingering toothpaste residue that could contribute to the burning sensation. 

When to Consult a Dentist?

Conditions when you need to consult a dentist are as followed

Persistent Burning Sensation 

If the burning sensation in your mouth continues after trying different toothpaste formulations or adjusting your brushing technique, it’s a clear sign that something may be amiss. Prolonged discomfort should not be ignored, as it may indicate an underlying issue that requires expert assessment. 

Experiencing Other Symptoms 

If the mouth burning sensation is accompanied by additional symptoms, such as bleeding gums, persistent bad breath, or changes in the appearance of your teeth or gums, it’s essential to consult a dentist promptly. These symptoms may be indicative of more significant oral health concerns that need professional attention. 

Allergic Reactions or Sensitivities 

If you suspect you may be allergic to specific ingredients commonly found in toothpaste, such as fluoride or flavoring agents, consulting a dentist is crucial. Allergic reactions can manifest in various ways, including mouth burning, and a dentist can help identify the cause and recommend suitable alternatives. 

Preexisting Dental Conditions 

If you have preexisting dental conditions, such as gum disease, cavities, or tooth sensitivity, a burning sensation in your mouth can exacerbate these issues. Dentists have the expertise to address your unique oral health concerns and recommend appropriate treatment and oral care products. 

Overall Oral Health Checkup 

Even if you experience occasional mouth burning, scheduling regular checkups with your dentist is essential for maintaining optimal oral health. During these appointments, your dentist can evaluate your overall oral health, identify potential concerns early on, and offer personalized recommendations. 

FAQs About Sensodyne Burning My Mouth 

What Ingredient in Toothpaste Can Cause a Burning Sensation?

Sodium lauryl sulfate (SLS) is a common detergent in toothpaste that can trigger a burning sensation in the mouth. It’s used as a foaming agent to help spread the paste around. 

How Does SLS Affect the Mouth?

SLS can cause a burning sensation in any part of the mouth, including the lips, tongue, or inner cheek tissue. It may also lead to dryness after brushing and alter your taste for up to four hours. 

Can SLS in Toothpaste Cause Tissue Sloughing?

Yes, if you’re sensitive to SLS, you might experience tissue sloughing, where the tissue in your inner cheeks or lips peels away, causing rawness, irritation, and a burning sensation. 

Is There a Link Between SLS in Toothpaste and Canker Sores?

Yes, a study showed that patients with recurrent canker sores experienced fewer sores after switching to an SLS-free toothpaste. 

Are Women More Sensitive to SLS in Toothpaste?

A study indicated that pre-menopausal women were significantly more sensitive to SLS in toothpaste compared to post-menopausal women. 

What is Burning Mouth Syndrome (BMS)?

BMS is a condition where the mouth feels like it’s on fire, often described as a tingling or numbing sensation. It’s a problem with how the nerves in the mouth send messages to the brain. 

What Causes Burning Mouth Syndrome?

The cause of BMS can be elusive and may result from a combination of factors, including reaction to ingredients in toothpaste, hormonal changes, stress, nutritional deficiencies, and more. 

How Common Is Burning Mouth Syndrome?

BMS is not very common. In a study of 100,000 residents, there were only 149 cases, with a higher prevalence in post-menopausal women. 

The Hidden Culprit Behind Toothpaste Discomfort 

In navigating the discomfort and confusion that comes with the burning sensation you might experience when using Sensodyne or similar toothpastes, it’s important to remember that you’re not alone. This sensation, often caused by ingredients like Sodium Lauryl Sulfate (SLS), can be more than just a minor annoyance; it can impact your daily oral hygiene routine and overall comfort.

However, the good news is that there are alternatives and solutions. By opting for SLS-free toothpastes, you can significantly reduce or even eliminate this burning sensation. Remember, your oral health is paramount, and finding the right toothpaste shouldn’t be a painful process. Listen to your body, and don’t hesitate to consult with a dental professional if the problem persists. Your comfort and health are worth that extra step. 

Read More about Oral Health:

Can Gingivitis Cause Sensitive Teeth? Shocking Facts! 2023

Why Are My Gums Sensitive All of a Sudden? A Dental Mystery Unveiled 2023

– Does Charcoal Damage Teeth? Jaw-dropping Facts! 2023

Best Stain Remover for Teeth: Ultimate Guide for Stain-Free Smile (2023)

Best Teeth Whitening Jamaica: Teeth Whitening in Jamaica for A Sweet Smile

Sources & References

  1. van Amerongen CCA, de Groot A, Volkering RJ, Schuttelaar MLA. Cheilitis caused by contact allergy to toothpaste containing stannous (tin) – two cases. Contact Dermatitis. 2020 Aug;83(2):126-129. doi: 10.1111/cod.13532. Epub 2020 Apr 13. PMID: 32212164; PMCID: PMC7496776. 

About the Author & Medical Reviewer:

Author Profile
Muhammad Muaz Sheikh

Muhammad Muaz is a seasoned professional in the realm of media and communication, boasting a Bachelor of Science in Mass Communication with a specialization in PR & Media Advertisement. With an innate understanding of effective communication strategies, Muaz has honed his expertise through extensive experience in various media houses, serving in key editorial roles. His journey in the field of media has equipped him with a profound understanding of storytelling and impactful content creation.

Author Profile
Dr. Paul Crane, DMD

Dr. Paul Crane, DMD, is a distinguished Doctor of Dental Medicine specializing in periodontics, with a career spanning over two decades. Renowned for his expertise in gum health and dental implants, Dr. Crane has become a trusted figure in the field of periodontics. His commitment to patient-centered care and advanced treatment techniques has earned him a reputation for excellence. Dr. Crane is deeply passionate about staying at the forefront of dental research and technology, ensuring his patients receive the highest quality of care available.