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Mouth Ulcers

Also indexed as: Aphthous Ulcers

Pain caused by mouth ulcers can make it difficult to eat, drink, or speak. How can you soothe the pain and shorten the healing time? According to research or other evidence, the following self-care steps may be helpful:

Trade in your toothpaste
SLS (sodium lauryl sulphate) is a common toothpaste ingredient linked to mouth ulcers; try an SLS-free toothpaste for three months

Aim for more balanced nutrition
Not getting the right amounts of certain vitamins can contribute to mouth ulcers; take a multivitamin containing zinc and generous amounts of vitamin B-complex, and include iron if tests show that your levels are low

Try a little liquorice
Try chewable (or powdered) deglycyrrhizinated liquorice (DGL) to shorten mouth ulcer healing time

Visit your dental care professional
Get checked for sources of minor trauma, such as rough fillings, braces, or poorly fitting dentures, which can aggravate mouth ulcers

Forego certain foods
Work with a knowledgeable health professional to find out if you’re sensitive to foods that make symptoms worse

These recommendations are not comprehensive and are not intended to replace the advice of your doctor or chemist. Continue reading the full mouth ulcers article for more in-depth, fully-referenced information on medicines, vitamins, herbs, and dietary and lifestyle changes that may be helpful.

About mouth ulcers

Mouth ulcers are small ulcerations within the mouth.

Doctors call this common condition aphthous stomatitis.

Product ratings for mouth ulcers

Science Ratings	Nutritional Supplements	Herbs
	B-complex (vitamin B1, vitamin B2, vitamin B6) Folic acid (for deficiency only) Iron (for iron deficiency only) Lactobacillus acidophilus Vitamin B12 (for deficiency only) Zinc (for deficiency only)	Aloe vera Liquorice (DGL)
		Agrimony Chamomile Cranesbill Echinacea Goldenseal Myrrh Oak Periwinkle Tormentil Witch hazel
See also: Homoeopathic Remedies for Mouth Ulcers
Reliable and relatively consistent scientific data showing a substantial health benefit. Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit. For a herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support and/or minimal health benefit.

What are the symptoms?

Mouth ulcers appear alone or in clusters as shallow, painful erosions in the mucous membrane inside the mouth. They typically have slightly raised, yellowish borders surrounded by a red zone, and are sometimes covered with a yellowish opaque material. Fatigue, fever, and swollen lymph nodes may be present in severe attacks.

Dietary changes that may be helpful

Sensitivity to gluten, a protein found in wheat and other grains, has been associated with recurrent mouth ulcers in some people. In preliminary trials, avoidance of gluten has reduced recurrent mouth ulcers in people whether or not they had coeliac disease,¹ ² ³ but a double-blind trial did not find gluten avoidance helpful to people with recurrent mouth ulcers who did not have coeliac disease.⁴ One preliminary trial suggested that people with recurrent mouth ulcers, whose blood contains antibodies to gliadin (a component of gluten), may respond to a gluten-free diet even if they have no evidence of the tissue changes associated with coeliac disease.⁵

Other food sensitivities or allergies may also make mouth ulcers worse.⁶ ⁷ One preliminary trial found evidence of food allergy in half of a group of people with recurrent mouth ulcers; avoidance of the offending foods resulted in improvement in almost all cases.⁸ While a double-blind study concluded that typical allergy mechanisms play only a minor role,⁹ people with recurrent mouth ulcers should discuss the diagnosis and treatment of food sensitivities with a doctor. For some people, treating allergies may be a key component to restoring health.

Lifestyle changes that may be helpful

Minor trauma from poor-fitting dentures, rough fillings, or braces can aggravate mouth ulcers and should be remedied by a dentist.

A few reports have found sodium lauryl sulphate (SLS), a component of some toothpastes, to be a potential cause of mouth ulcers.¹⁰ In one trial, most recurrent mouth ulcers were eliminated just by avoiding toothpaste containing SLS for three months.¹¹ Positive effects of eliminating SLS have been confirmed in double-blind research.¹² SLS is thought to increase the risk of mouth ulcers by removing a protective coating (mucin) in the mouth. People with recurrent mouth ulcers should use an SLS-free toothpaste for a few months to see if such a change helps.

Measurements of stress were associated with recurrent mouth ulcers in one preliminary study,¹³ but not in another.¹⁴ More research is needed to determine whether stress reduction techniques might reduce mouth ulcer recurrences.

Vitamins that may be helpful

A few preliminary studies,¹⁵ ¹⁶ ¹⁷ ¹⁸ though not all,¹⁹ have found a surprisingly high incidence of iron and B vitamin deficiency among people with recurrent mouth ulcers. Treating these deficiencies has been reported in preliminary²⁰ ²¹ and controlled²² studies to reduce or eliminate recurrences in most cases. Supplementing daily with B vitamins—300 mg vitamin B1, 20 mg vitamin B2, and 150 mg vitamin B6—has been reported to provide some people with relief.²³ Thiamine (B1) deficiency specifically has been linked to an increased risk of mouth ulcers.²⁴ The right supplemental level of iron requires diagnosis of an iron deficiency by a healthcare professional using lab tests.

Zinc deficiency has also been linked with recurrent mouth ulcers in preliminary studies²⁵ and in one case report.²⁶ A preliminary trial found that supplementation with up to 150 mg of zinc per day reduced recurrences of mouth ulcers by 50 to 100%; participants who were zinc deficient experienced the most consistent benefit.²⁷ However, a double-blind trial (that did not test people for zinc deficiency) did not find zinc supplements helpful for recurrent mouth ulcers.²⁸

According to preliminary reports, some people with recurrent mouth ulcers may respond to topical and/or oral use of Lactobacillus acidophilus²⁹ and Lactobacillus bulgaricus.³⁰ However, a double-blind study found no effect of acidophilus bacteria on the healing time of mouth ulcers.³¹

Are there any side effects or interactions?
Refer to the individual supplement for information about any side effects or interactions.

Herbs that may be helpful

Liquorice that has had the glycyrrhizic acid removed is called deglycyrrhizinated liquorice (DGL). Glycyrrhizic acid is the portion of liquorice root that can increase blood pressure and cause water retention in some people. The wound-healing and soothing components of the root remain in DGL.

A mixture of DGL and warm water applied to the inside of the mouth may shorten the healing time for mouth ulcers, according to a double-blind trial.³² This DGL mixture is made by combining 200 mg of powdered DGL and 200 ml of warm water. It can then be swished in the mouth for two to three minutes, then spit out. This procedure may be repeated each morning and evening for one week. Chewable DGL tablets may be an acceptable substitute.

A gel containing the aloe polysaccharide acemannon was found in one double-blind trial to speed the healing of mouth ulcers better than the conventional treatment Orabase Plain®.³³ The gel was applied four times daily. Because acemannon levels can vary widely in commercial aloe gel products, it is difficult to translate these results to the use of aloe gel for mouth ulcers.

The antiviral, immune-enhancing, and wound-healing properties of echinacea may make this herb a reasonable choice for mouth ulcers. Liquid echinacea in the amount of 4 ml can be swished in the mouth for two to three minutes, then swallowed. This procedure may be repeated three times per day. However, no research has investigated the possible effects of this treatment.

Because of its soothing effect on mucous membranes (including the lining of the mouth) and its healing properties, chamomile may be tried for mouth ulcers and other mouth irritations.³⁴ A strong tea made from chamomile tincture can be swished in the mouth before swallowing, three to four times per day. Goldenseal has also been used historically as a mouthwash to help heal mouth ulcers.

Myrrh, another traditional remedy with wound-healing properties, has a long history of use for mouth and gum irritations. Some herbalists suggest mixing 200 to 300 mg of herbal extract or 4 ml of myrrh tincture with warm water and swishing it in the mouth before swallowing; this can be done two to three times per day.

Historically, herbs known as astringents have been used to soothe the pain of mouth ulcers. These herbs usually contain tannins that can bind up fluids and possibly relieve inflammation. They are used as a mouth rinse and then are spit out. None of these herbs has been studied in modern times. Examples of astringent herbs include agrimony, cranesbill, tormentil, oak, periwinkle, and witch hazel. Witch hazel is approved by the German Commission E for local inflammations of the mouth, presumably a condition that includes mouth ulcers.

Are there any side effects or interactions?
Refer to the individual herb for information about any side effects or interactions.

References
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2. Ferguson R, Basu MK, Asquith P, Cooke WT. Jejunal mucosal abnormalities in patients with recurrent aphthous ulceration. Br Med J 1976;1(6000):11–13.

3. Ferguson MM, Wray D, Carmichael HA, et al. Coeliac disease associated with recurrent aphthae. Gut 1980;21:223–6.

4. Hunter IP, Ferguson MM, Scully C, et al. Effects of dietary gluten elimination in patients with recurrent minor aphthous stomatitis and no detectable gluten enteropathy. Oral Surg Oral Med Oral Pathol 1993;75:595–8.

5. O’Farrelly C, O’Mahony C, Graeme-Cook F, et al. Gliadin antibodies identify gluten-sensitive oral ulceration in the absence of villous atrophy. J Oral Pathol Med 1991;20:476–8.

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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or chemist for any health problem and before using any supplements or before making any changes in prescribed medications.