Causes of burning mouth sensation

Overview

Burning mouth sensation, also known as burning mouth syndrome, is a condition where you feel a burning, scalding, or tingling feeling on your tongue, lips, gums, or the roof of your mouth. It can feel like you have just drunk something very hot. The feeling can be constant or come and go. For many people, it is not caused by a visible problem in the mouth. Instead, it may be linked to other health issues, medications, or stress.

Burning mouth sensation is not extremely common, but it does affect many people, especially middle-aged or older adults. Studies suggest it may affect around 1-5% of adults.

It can affect anyone, but it is most common in women, especially after menopause. It also may occur more often in people with certain medical conditions like diabetes, thyroid problems, or acid reflux. Many people with burning mouth are over 50.

Symptoms

Common symptoms

• A burning, scalding, or tingling feeling on the tongue, lips, gums, roof of mouth, or inside the cheeks
• The feeling may be present every day or come and go
• Dry mouth (xerostomia) or increased thirst
• A metallic, bitter, or sour taste in the mouth
• Numbness or a prickly sensation

Symptoms in children

• Burning mouth is rare in children, but if it occurs, it might be linked to a food allergy, infection, or a reaction to a medication.
• Children may also have a sore tongue from biting, spicy foods, or mouth breathing.

Symptoms in older adults

• Older adults may have a higher risk due to multiple medications, nutritional deficiencies (like vitamin B12 or iron), or chronic illnesses.
• Dry mouth is more common with age and can worsen burning sensations.
• Older adults may also have dentures that are not fitting well, causing irritation.

Causes

Main causes

• Primary burning mouth syndrome: no clear medical cause is found; it may be linked to nerve problems (neuropathy) or psychological factors like stress and anxiety.
• Secondary burning mouth syndrome: caused by another condition such as oral infections (like thrush), acid reflux, diabetes, thyroid problems, nutritional deficiencies (iron, zinc, B vitamins), allergies (to foods, dental materials), or certain medications.
• Dentures that don't fit well, or irritation from mouthwashes, toothpaste, or acidic foods.
• Hormonal changes, especially during menopause.

Risk factors

• Being female, especially after menopause
• Age over 50
• Having an autoimmune disease (like Sjögren's syndrome that causes dry mouth)
• Taking multiple medications (polypharmacy)
• High stress or anxiety levels
• Smoking or using tobacco products
• A history of food allergies or sensitivities

When to see a doctor

See a doctor urgently if:

• If burning mouth is accompanied by swelling of the tongue, lips, or throat, or difficulty breathing (call emergency services immediately).
• If you have a high fever or signs of a severe allergic reaction.

Book a routine appointment if:

• If the burning sensation lasts for more than a few days and is bothersome.
• If you also have dry mouth, changes in taste, or mouth sores.
• If you have a known condition (like diabetes) that is not well controlled.
• If you are concerned about a possible side effect from a medication (do not stop any medication without talking to your doctor).

Diagnosis

Your doctor will ask you about your symptoms, medical history, and any medications you take. They will also examine your mouth, teeth, and gums. Often no obvious cause is seen, so they may do tests to rule out other conditions.

Tests that may be done

• Blood tests to check for nutritional deficiencies (like iron, vitamin B12, folic acid), diabetes, thyroid problems, and autoimmune markers.
• Oral swab or culture to test for fungal infections like oral thrush.
• Allergy testing if a reaction to dental materials or foods is suspected.
• Sometimes a referral to a dentist or an ear, nose, and throat (ENT) specialist for further assessment.

What to expect at your appointment

Your doctor will work with you to find possible causes. It may take a few appointments and tests. In many cases, no specific cause is found, and treatment focuses on relieving symptoms. Do not be discouraged if the diagnosis takes time; your doctor will help you manage the condition.

Treatment

Treatment depends on the underlying cause. If a cause is found, treating that condition often improves the burning sensation. For primary burning mouth syndrome, treatments aim to reduce symptoms and improve comfort. Your doctor will work with you to create a plan.

Self-care at home

• Sip cool water or suck on ice chips throughout the day to soothe your mouth.
• Avoid very hot, spicy, acidic, or salty foods that can worsen the burning.
• Chew sugar-free gum or suck on sugar-free lozenges to help with dry mouth.
• Use a soft-bristled toothbrush and avoid mouthwashes that contain alcohol.
• If you wear dentures, make sure they fit properly and take them out at night.

Medical treatments

Your doctor may recommend treatments such as special mouth rinses, oral medications that help with nerve pain (like certain antidepressants or anticonvulsants), or medications to treat underlying conditions like thrush or acid reflux. Always follow your doctor's advice and do not self-medicate.

When is surgery considered?

Surgery is not a treatment for burning mouth sensation. If the cause is a structural problem, such as an ill-fitting denture or a dental issue, a dentist may adjust or replace the denture, but that is not surgery in the usual sense.

Living with this condition

Burning mouth can be frustrating, but many people learn to manage it. Keep a symptom diary to track what makes it better or worse. Practice good oral hygiene. If you feel anxious or stressed, try relaxation techniques like deep breathing or meditation.

Lifestyle tips

• Stay hydrated – drink plenty of water throughout the day.
• Avoid tobacco, alcohol, and mouthwashes that contain alcohol or strong flavors.
• Manage stress with activities you enjoy, such as walking, reading, or listening to music.
• Get enough sleep, as fatigue can worsen symptoms.

Diet and exercise

Eat a balanced diet rich in iron, B vitamins, and other nutrients. Include lean meats, leafy greens, whole grains, and dairy. Avoid very hot, spicy, or acidic foods that may trigger burning. Gentle exercise, like walking or yoga, can help reduce stress and improve overall well-being.

Mental health and emotional wellbeing

Chronic burning mouth can cause frustration, anxiety, and depression. It is normal to feel upset when pain does not go away. Talk to your doctor if the condition is affecting your mood. They can support you with counselling, stress management techniques, or by referring you to a mental health professional. If you ever have thoughts of harming yourself, contact a crisis helpline or go to your local emergency department immediately.

Prevention

Not all cases can be prevented, especially primary burning mouth syndrome. However, you can reduce your risk by managing conditions like diabetes, avoiding tobacco, eating a nutritious diet, staying hydrated, and seeing your dentist regularly. If you wear dentures, ensure they fit properly and clean them daily.

Complications

If left untreated

• Persistent pain that can interfere with eating, drinking, and speaking.
• Loss of appetite and unintended weight loss.
• Anxiety, depression, and social withdrawal due to discomfort.
• Difficulty sleeping if pain is worse at night.

Long-term outlook

For many people, burning mouth sensation can be managed effectively. Even when no clear cause is found, treatments and lifestyle changes can help reduce symptoms and improve quality of life. It may take time to find what works for you, but most people find relief. Talk to your doctor – you do not have to live with constant pain.

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