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Burning Mouth Syndrome: Etiology, Symptoms, and Treatment

Micaela Milano, MBA • May 29, 2024
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Dr. Scott Froum and Micaela Milano, MBA, investigate burning mouth syndrome and its oral-systemic link, as well as various treatment modalities including drug therapy.

Burning mouth syndrome (BMS) is a chronic oral condition characterized by burning sensations and pain in the absence of clinical mucosal changes. It tends to affect more middle-aged and elderly women, typically on the tongue, lips, and hard and soft palate areas. Patients may also experience unremitting mucosal pain, dysgeusia, or xerostomia. BMS can be divided into two clinical forms: primary and secondary.

Types of BMS

Primary BMS is an idiopathic condition in which the cause cannot be determined; neuropathological causes are likely. Diagnosing primary BMS requires ruling out other etiological factors. Conversely, secondary BMS can arise due to local, systemic, and/or psychological causes; therefore, identifying its exact cause helps alleviate symptoms associated with BMS. When such factors are addressed or eliminated, treatment usually leads to significant clinical improvements in symptoms associated with this disorder.

Hormone Levels and BMS

Recent research has demonstrated the role hormones can have in both the development and progression of BMS. Hormones—particularly those related to inflammation—have been connected with various symptoms, such as burning sensation, dry mouth, taste changes, and sensitivity to spicy foods. Studies have revealed that individuals with BMS tend to have higher levels of pro-inflammatory mediators like interleukin-6, -8, -10, and -12 than healthy individuals.1 Furthermore, these same cytokines were linked with higher salivary cortisol levels among patients with BMS.2


In addition to inflammatory markers, sex hormones appear to be involved in developing and treating BMS symptoms. Estrogen levels were significantly lower among postmenopausal women with BMS than non-BMS controls.3 Studies also suggest that reduced progesterone may contribute to BMS symptoms among both those who are postmenopausal as well as those on hormone therapy.


Some researchers have proposed a possible connection between thyroid hormones and BMS. They suggest that altered thyroid functioning could contribute to neuropathy or other issues leading to the development of BMS4; however, further investigation is necessary before any definitive conclusions can be made about this potential association.5

Nutritional Levels and BMS

Assessing nutritional status when diagnosing patients with BMS is critical due to its potential effects on hormonal balance. Low nutrition can lead to anemia, which has been associated with lower production of hormones such as estrogen and testosterone that could exacerbate symptoms associated with BMS. Furthermore, certain vitamins and minerals are necessary for proper hormone balance, which helps mitigate some symptoms associated with the condition. Several therapies—vitamin replacement, zinc replacement, and hormone replacement—have been found to be effective in relieving oral burning or pain symptoms associated with BMS in those deficient in that factor.

Conclusion

Hormones and nutritional status can play a significant role in the development and progression of BMS. With proper assessment and treatment tailored toward modulating specific hormone and vitamin levels as well as necessary dietary modifications, patients may experience improved symptom management from this debilitating condition over time.


After eliminating potential causes, drug therapy should be initiated. Recent randomized, controlled clinical trials have suggested that drug therapy with capsaicin, alpha-lipoic acid, gabapentin, clonazepam, and antidepressants may provide relief of oral burning or pain symptoms.6 Psychotherapy and behavioral feedback may help eliminate BMS symptoms as well.

Note: This article originally appeared in Perio-Implant Advisory, a chairside resource for dentists and hygienists that focuses on periodontal- and implant-related issues.

Micaela Milano, MBA: With 15 years of professional experience, Micaela created Meraki Integrative and Functional Regenerative Medicine. This integrative medical spa is dedicated to providing clients with a functional, holistic, and spiritual solution to complex medical issues and finding a balance between beauty, health, and overall vitality. Inspired to live a life of complete wellness—synergy of the mind, body, and spirit—Micaela left a successful career in the global finance industry to reinvent herself in the field of functional health and well-being. She is a 200-hour registered yoga teacher, certified teacher of kid yoga, advanced health coach, Reiki practitioner, Seraphim Blueprint angelic healer, and certified crystal healer. Contact her at Meraki Integrative Functional + Regenerative Medicine.

Scott Froum, DDS (Co-Author): A graduate of the State University of New York, Stony Brook School of Dental Medicine, is a periodontist in private practice at 1110 2nd Avenue, Suite 305, New York City, New York. He is the editorial director of Perio-Implant Advisory and serves on the editorial advisory board of Dental Economics. Dr. Froum, a diplomate of both the American Academy of Periodontology and the American Academy of Osseointegration, is a volunteer professor in the postgraduate periodontal program at SUNY Stony Brook School of Dental Medicine. He is a PhD candidate in the field of functional and integrative nutrition. Contact him through his website at drscottfroum.com or (212) 751-8530.

References

  • Barry A, O'Halloran KD, McKenna JP, McCreary C, Downer EJ. Plasma IL-8 signature correlates with pain and depressive symptomatology in patients with burning mouth syndrome: results from a pilot study. J Oral Pathol Med. 2018;47(2):158-165. doi:10.1111/jop.12666
  • Gambardella A, Licata G, De Rosa A, et al. Burning mouth syndrome associated with tumor necrosis factor (TNF)-α inhibitor. Int J Dermatol. 2020;59(3):e70-e71. doi:10.1111/ijd.14681
  • Nagamine T. Two-hit theory by estrogen in burning mouth syndrome. J Dent Sci. 2022;17(4):1833-1834. doi:10.1016/j.jds.2022.06.009
  • Talattof Z, Dabbaghmanesh MH, Parvizi Y, Esnaashari N, Azad A. The association between burning mouth syndrome and level of thyroid hormones in Hashimotos thyroiditis in public hospitals in Shiraz, 2016. J Dent (Shiraz). 2019;20(1):42-47. doi:10.30476/DENTJODS.2019.44562
  • Kumar K. Can thyroid cause burning mouth syndrome? MedicineNet. https://www.medicinenet.com/ can_thyroid_cause_ burning_mouth_syndrome/article.htm
  • López-D'alessandro E, Escovich L. Combination of alpha lipoic acid and gabapentin, its efficacy in the treatment of burning mouth syndrome: a randomized, double-blind, placebo controlled trial. Med Oral Patol Oral Cir Bucal. 2011;16(5):e635-e640. doi:10.4317/medoral.16942
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