
Mouthwash is an effective way to maintain good oral hygiene. However, many people experience a burning sensation when using mouthwash, even when it is alcohol-free. This burning sensation is caused by ingredients such as menthol, chlorhexidine, or essential oils like peppermint oil, which are added to kill bacteria and sanitise the mouth. While this burning feeling is not uncommon, it can be uncomfortable and irritating, and there are alternative mouthwashes available that do not cause this reaction.
| Characteristics | Values |
|---|---|
| Burning sensation caused by | Alcohol, menthol, chlorhexidine, hydrogen peroxide, peppermint oil, eucalyptus oil, thyme oil, cetylpyridinium chloride |
| Burning sensation not caused by | Alcohol alone (other ingredients required) |
| Burning sensation relieved by | Alcohol-free mouthwash, menthol-free mouthwash, mint-free mouthwash, flavourless mouthwash, mouthwash with milder flavour |
| Burning sensation unrelated to | Mouthwash effectiveness |
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What You'll Learn

Alcohol is a common ingredient in mouthwash
Mouthwash is a popular product used to maintain oral hygiene. It is available in a variety of formulations, some containing alcohol and others being alcohol-free. Alcohol is a common ingredient in mouthwash, often included for its antiseptic properties. It acts as a preservative and helps kill bacteria that contribute to bad breath, plaque, and gum disease. However, it is important to note that alcohol alone is insufficient to eliminate all harmful bacteria.
The inclusion of alcohol in mouthwash formulations is intended to provide a refreshing and clean feeling. It is often associated with a robust and intense sensation. Alcohol acts as a carrier for other active ingredients, enhancing their effectiveness. It helps penetrate the plaque biofilm and promotes a healthier oral microbiome. The concentration of alcohol in mouthwash can vary, typically ranging from 14% to 27% by volume.
While alcohol is a prevalent ingredient, it is not essential for an effective mouthwash. Alcohol-free mouthwashes offer a gentler alternative and are equally beneficial for oral health. They are particularly suitable for individuals with dry mouth (xerostomia), sensitivity, or a history of alcohol abuse. Alcohol-free formulations can effectively prevent periodontal diseases, tooth decay, plaque, and tartar growth while also providing teeth whitening effects.
The choice between alcohol-containing and alcohol-free mouthwash depends on personal preferences and oral health needs. Alcohol can cause a burning sensation for some individuals, especially those with sensitive gums or burning mouth syndrome. It can also lead to dryness in the mouth. However, it is important to note that not all mouthwashes cause burning, and sensitivity levels vary among individuals.
In summary, alcohol is a common ingredient in mouthwash due to its antiseptic and preservative properties, but it is not a necessity. Alcohol-free alternatives offer comparable benefits without the potential discomfort associated with alcohol. Consulting a dental professional for personalized recommendations is always advisable to ensure the chosen mouthwash aligns with specific oral care requirements.
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Chlorhexidine may also be the cause
While alcohol is a common ingredient in mouthwash that causes a burning sensation, chlorhexidine, another common ingredient, may also be the cause. Chlorhexidine is a prescription-strength product that is often recommended by dentists or periodontists for patients with chronic gum disease undergoing deep cleanings. Peridex and Perioguard are two common examples of mouthwashes containing chlorhexidine.
Chlorhexidine is known to cause a mild burning sensation in the mouth, and this side effect usually improves with continued use of the product. However, if the burning does not subside, it is recommended to consult a doctor or pharmacist. In rare cases, individuals may experience an allergy to chlorhexidine, with symptoms such as a swollen mouth, throat, or tongue, difficulty breathing, and hives. It is important to note that severe allergic reactions to chlorhexidine have been reported, and the Food and Drug Administration (FDA) has issued a warning about this.
If you suspect that your mouthwash containing chlorhexidine is causing the burning sensation, you can try using an alternative mouthwash that does not contain this ingredient. There are many alcohol-free and chlorhexidine-free mouthwashes available that can be effective in maintaining oral hygiene. It is always recommended to consult a dentist or healthcare professional for advice on choosing the right mouthwash for your specific needs.
To alleviate the burning sensation caused by chlorhexidine, it is suggested to sip water, chew sugar-free gum, or suck on sugar-free sweets. These temporary measures can help cope with the side effects until the body adjusts to the treatment. However, if the burning persists or becomes unbearable, it is important to discontinue use and seek medical advice.
Overall, while chlorhexidine is an effective ingredient in combating oral health issues, it is important to be aware of its potential side effects, including the possibility of a burning sensation in the mouth. Individuals using mouthwashes containing chlorhexidine should monitor their experience and consult healthcare professionals if they have any concerns or adverse reactions.
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Menthol and mint flavourings can cause burning
Mouthwash is designed to freshen your breath and help maintain good oral health. However, it can sometimes cause a burning sensation in the mouth. While alcohol is a common ingredient that causes this, menthol and mint flavourings can also be the culprit.
Menthol is a common ingredient in mouthwash, giving it a strong, minty flavour and making your mouth feel tingly and cold. It is sourced as an oil, primarily from peppermint. Mouthwashes with high levels of menthol are likely to sting the most. Menthol is an antimicrobial, meaning it kills bacteria and stops their growth. However, it can cause a burning sensation for some people.
Mint flavourings, such as peppermint oil, are also added to mouthwash to freshen breath. However, like menthol, these ingredients can irritate the mucous membranes in the mouth, causing a burning sensation.
If you are sensitive to mint-infused flavours, opt for a mouthwash that is milder in flavour. Many children's mouth rinses are mildly flavoured and do not contain mint, so they are less likely to cause a burning sensation. Flavours to look out for include strawberry and bubble gum.
It is important to remember that mouthwash should be used as a complement to your daily oral care routine, not as a replacement for brushing and flossing. If you are experiencing ongoing burning or discomfort from using mouthwash, discontinue use and consult your dentist.
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Mouthwash isn't necessary for oral hygiene
Mouthwash is often marketed as an essential part of oral hygiene, but this is not necessarily the case. While mouthwash can be beneficial in certain circumstances, it is not a mandatory component of oral care and may even be unnecessary or detrimental for some individuals.
Firstly, it is important to understand that mouthwash does not replace proper mechanical teeth cleaning. Brushing and flossing are fundamental to maintaining good oral hygiene, and mouthwash should only be used adjunctively, or alongside, these mechanical oral hygiene measures. The Australian Therapeutic Guidelines state that a mouthwash is typically not required as part of a standard oral hygiene routine and should not be used as a substitute for thorough teeth cleaning.
Additionally, mouthwash may not be necessary for individuals with good periodontal health or a low risk of cavities. In these cases, the potential risks of using mouthwash may outweigh the benefits. These risks can include allergic reactions, dysbiosis of the oral microbiota, the emergence of antimicrobial resistance, and negative environmental impacts. Excessive mouthwash use (more than twice a day) can also damage the mouth's microbiome and may be unnecessary for maintaining oral hygiene.
Furthermore, mouthwash is not essential for preventing tooth decay. While mouthwashes containing fluoride can help prevent tooth decay, it is not necessary to use mouthwash after brushing your teeth. In fact, using mouthwash directly after brushing can wash away the concentrated fluoride in the toothpaste left on your teeth. It is recommended to choose a different time to use mouthwash, such as after lunch, and to avoid eating or drinking for 30 minutes after using a fluoride mouthwash.
For individuals who experience mouth irritation or burning from mouthwash, alcohol-free formulas can be a gentler alternative. Alcohol is not a necessary ingredient for an effective, bacteria-killing mouthwash, and there are many alcohol-free options available from leading mouthwash brands. Menthol-free, mint-free, and flavorless oral rinses are also available for those who find certain ingredients irritating.
In conclusion, while mouthwash can provide benefits such as reducing the risk of bad breath, cavities, or gum disease, it is not a necessary component of oral hygiene for everyone. Proper mechanical teeth cleaning through brushing and flossing is the foundation of good oral hygiene, and mouthwash should only be used adjunctively if recommended by a dental professional.
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Alcohol-free mouthwash is an effective alternative
Many people experience a burning sensation when using mouthwash. This is usually caused by ingredients such as alcohol, menthol, chlorhexidine, or essential oils like peppermint oil, eucalyptus oil, and thyme oil. While it is common for mouthwash to burn, it is important to note that it is not necessary for it to burn in order to be effective.
Alcohol is often included in mouthwash as a solvent to kill bacteria and sanitise the mouth. However, it is not a necessary ingredient for an effective mouthwash, and there are many alcohol-free alternatives available that can be just as beneficial. Alcohol-free mouthwashes can be more gentle on the tongue, mouth, and gums, reducing the burning sensation without compromising on oral hygiene. Leading mouthwash brands have recognised this and now offer alcohol-free formulas that are proven to be effective against the bacteria that cause gum disease.
If you are experiencing ongoing burning or discomfort when using mouthwash, it is recommended to discontinue use and consult a dentist. They can examine your gums and recommend alternative products that may cause less irritation, such as alcohol-free mouthwashes or those with milder flavours. It is important to remember that mouthwash should be used as a complementary component to a daily oral care routine, which includes proper brushing and flossing techniques.
To summarise, while burning sensations from mouthwash are common, they should not be tolerated as a necessary evil. Alcohol-free mouthwashes are an effective alternative that can provide the same oral hygiene benefits without the discomfort. With a range of options available, including those with milder flavours or essential oils, maintaining good oral health doesn't have to be a painful experience.
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Frequently asked questions
The burning sensation is usually caused by ingredients like alcohol, menthol, chlorhexidine, or essential oils. Alcohol is a common ingredient in mouthwash and acts as a solvent and antiseptic, but it's not necessary for an effective mouthwash.
Alcohol-free mouthwashes can still contain other active ingredients that may cause a burning sensation, such as chlorhexidine, cetylpyridinium chloride, or essential oils like peppermint, eucalyptus, or thyme oil. Some people may be sensitive to these ingredients.
You can try a different mouthwash with milder ingredients, such as alcohol-free or flavourless formulas, or children's mouthwash in flavours like strawberry or bubble gum. You can also try adding a few drops of specific essential oils to a cup of water and rinsing with that. If the burning persists, consult your dentist.
The burning sensation is not a sign that the mouthwash is working, but rather a side effect of irritation caused by strong ingredients. Mouthwash may offer additional benefits like reducing bad breath, cavities, or gum disease, but it should not replace optimal brushing and flossing.











































