Burning tongue: causes, burning mouth syndrome, stress, menopause and tests

What causes a burning tongue?

A burning tongue has two main groups of causes: conditions and factors that can be identified and treated, and primary burning mouth syndrome, diagnosed when no such cause is present. The US institute NIDCR stresses that the mouth often looks normal, so a dentist or doctor first rules out other causes.

NIDCR lists secondary causes including dry mouth due to medicines, Sjögren’s syndrome or radiotherapy; infections such as yeast infections; habits such as excessive tongue movements; allergies to dental materials (usually metals), oral hygiene products or foods; reflux; diabetes and thyroid disease; some blood pressure medicines; and B vitamin and iron deficiencies.

Anxiety, low mood and stress can also cause or worsen the burning; NIDCR includes them on the same list. When a secondary cause is found and addressed, symptoms may resolve, as the MSD Manual notes.

Burning tongue: possible causes, clues and tests

The table pairs secondary causes listed by NIDCR, the MSD Manual and the ICHD-3 classification with tests that help confirm or exclude them. A dentist or doctor decides which tests are needed after taking a history and examining the mouth.

Burning mouth syndrome: when is it diagnosed?

According to the international ICHD-3 classification, burning mouth syndrome (formerly stomatodynia, or glossodynia when confined to the tongue) is burning or an unpleasant sensation in the mouth recurring daily for more than 2 hours a day for longer than 3 months, without a visible lesion to explain it. The lining of the mouth looks normal and examination, including sensory testing, reveals no abnormalities.

The burning is usually bilateral, most often affects the tip of the tongue and varies in intensity. It may be accompanied by subjective dry mouth, unpleasant sensations and altered taste. NIDCR adds that for some people pain is milder on waking and builds throughout the day, while eating and drinking often bring temporary relief.

Burning mouth syndrome is a diagnosis of exclusion, so it takes patience and sometimes several visits. The MSD Manual notes that it rarely starts before age 30. ICHD-3 reports that laboratory investigations and brain imaging have shown changes in patients’ central and peripheral nervous systems.

Burning tongue and palate: who is most often affected?

Burning of the tongue and palate in burning mouth syndrome most often affects women over 50. A 2022 meta-analysis by Wu et al. (18 studies) reports a prevalence of 1.73% in the general population and 7.72% among patients in healthcare settings, with higher figures in women than men (1.15% versus 0.38%) and in people over 50 (3.31% versus 1.92%).

A 2016 Cochrane review reports general population prevalence ranging from 0.1 to 3.9%, depending on the study. According to NIDCR, the pain most often affects the tongue but may involve the lips, palate or the whole mouth, and symptoms last months or years.

Burning tongue, stress and menopause: what is the connection?

A burning tongue is more common in women during and after the menopause. ICHD-3 highlights the high prevalence of the syndrome in postmenopausal women. The same classification notes that some studies describe coexisting psychosocial and psychiatric disorders in affected patients.

A 2026 review by Qaderi et al. (22 studies) linked burning mouth syndrome with female sex, menopause, an underactive thyroid, long-term medication use and older age, as well as depression, anxiety, stressful events and poor sleep. The authors stress that none of these factors can be considered the sole cause.

A connection with stress does not mean the burning is imagined: the MSD Manual considers the syndrome probably neuropathic, involving nerves responsible for pain and taste. A Cambridge university hospital leaflet tells patients that hormone replacement therapy does not improve symptoms and that reassurance about the absence of serious disease often helps.

What does a dentist check, and which tests does a doctor request?

For a burning tongue, a dentist examines the lining of the mouth, teeth, gums and dentures, looks for infection and irritation, and asks about habits such as pressing the tongue against the teeth or clenching. NIDCR explains that, if necessary, the dentist refers the patient to a specialist in oral surgery or oral medicine, or to an ear, nose and throat specialist.

According to NIDCR, further investigations include blood tests, oral swabs, allergy tests, salivary flow measurement and imaging. A Croatian study of 150 people with burning and a normal-looking oral lining used, among other tests, Candida swabs, salivary flow measurement, full blood count, ferritin, glucose and Helicobacter pylori antibodies (Brailo et al., 2006).

A GP can request blood tests and also assess the thyroid, reflux symptoms and medication list. Prepare the information listed below before your appointment.

• A list of all medicines and supplements, including recently started ones.
• When the burning began and whether it changes throughout the day.
• Recent blood test results, if you have them.
• New toothpastes, mouthwashes, dentures or fillings in recent months.

How is burning mouth syndrome treated, and what does research show?

Secondary burning is treated by addressing its cause, such as thrush, a confirmed deficiency or irritating dentures; treatment of primary burning mouth syndrome relieves symptoms. The MSD Manual lists cognitive behavioural therapy, medicines acting on the nervous system used systemically or topically, an antioxidant supplement, topical preparations and low-level laser therapy.

The evidence is weak. A 2016 Cochrane review (23 randomised trials, 1 121 participants, 83% women) rated the evidence for all treatments as very low quality. It noted possible short-term benefit from electromagnetic radiation therapy, topical benzodiazepines, tongue protectors and one anticonvulsant, and longer-term benefit from approaches including psychological therapy. However, it concluded that the effectiveness of any treatment could neither be confirmed nor ruled out.

The natural course can be prolonged. In an Italian study of 53 people followed for an average of 56 months, 3% reported complete spontaneous resolution within 5 years and fewer than 30% reported moderate improvement (Sardella et al., 2006). A doctor tailors treatment, often combining several methods.

What helps a burning tongue day to day?

Home measures do not cure the syndrome but may reduce discomfort. NIDCR suggests the simple steps listed below. The review by Qaderi et al. indicates that smoking, alcohol and acidic, hot and heavily spiced foods worsen symptoms.

• Sip cold drinks or suck ice cubes.
• Chew sugar-free gum.
• Avoid hot and spicy foods, acidic fruits and citrus juices.
• Stop using mouthwashes containing alcohol.
• Do not smoke and limit alcohol.
• Keep notes of when the burning worsens and show them to your doctor.

How it works at DentalBlue

At DentalBlue in Białystok, a clinician examines the lining of the mouth, teeth, gums and dentures and asks about medicines and systemic conditions when assessing a burning tongue. “Wizyta bez bólu” (visit without pain) includes a panoramic X-ray, consultation, examination and written treatment plan (300 zł in the clinic’s price list). If the burning is related to dentures, the price list includes “Konsultacja protetyczna” (prosthodontic consultation) at 300 zł. The final scope and cost are agreed at the appointment, and prices may change. A GP or specialist handles blood tests and investigation of systemic conditions.