Overview

This condition is a type of long-term discomfort or pain felt inside the mouth. People often describe it as a burning, hot, or scalding sensation. It most commonly affects the tongue, the lips, and the inside of the cheeks, though it can sometimes be felt across the whole mouth. It is not contagious, and it is not a form of mouth cancer.

While it can affect anyone, it is most frequently seen in women, particularly those who have gone through the menopause. It is estimated that between 0.75% and 15% of the population may experience this at some point. Because the mouth often looks completely normal during an examination, it can be a frustrating and confusing experience for those living with it. However, please be reassured that while it is a persistent condition, it is well-recognised by medical professionals, and there are many ways to manage the discomfort and improve your quality of life.

Symptoms and Causes

Understanding why this happens can be the first step toward feeling more in control. The condition is generally thought to be a form of neuropathic pain, which means it relates to how the nerves in your mouth send signals to your brain. Think of it like a faulty electrical wire that sends a "pain" signal even when there is no actual injury to the area.

Symptoms

The sensations can vary from person to person, but common experiences include:

• A persistent burning, tingling, or numb feeling in the mouth.
• A sensation that the mouth has been scalded by a hot drink.
• A dry or sore feeling in the mouth.
• Changes in how things taste, often described as a metallic or bitter flavour.

For many, these symptoms are at their worst during the day and tend to ease off when you are sleeping or resting. Some people find that the pain is constant, while others notice it comes and goes. Talking, eating spicy or hot foods, and feeling stressed can often make the burning sensation feel more intense.

Causes

There are two main ways to look at the causes. Sometimes, it is "primary," meaning there is no clear underlying medical reason found, and it is simply a change in how the nerves function. Other times, it is "secondary," meaning it is linked to another factor. Common triggers include:

• Hormonal changes: Especially those associated with the menopause.
• Dry mouth: This can be caused by certain medications, diabetes, or conditions like Sjögren's syndrome (a condition that affects the glands that produce moisture).
• Nutritional gaps: Low levels of iron, vitamin B12, or folic acid.
• Oral health issues: Such as fungal infections (thrush), acid reflux, or dentures that do not fit correctly.
• Emotional factors: Stress, anxiety, and depression are known to make the symptoms feel much worse.

Diagnosis and Investigations

Because there is no single test that can instantly identify this condition, the diagnosis is made by carefully ruling out other possible causes. This is a standard and thorough process to ensure nothing else is being missed.

Diagnosis

Your doctor or specialist will start by taking a detailed history of your symptoms. They will ask you to describe exactly what the pain feels like, when it happens, and how it affects your daily routine. They will perform a very careful examination of your mouth, looking at the tongue, gums, and cheeks to check for any visible signs of irritation, infection, or other dental issues.

Investigations

To be certain of the diagnosis, your medical team may suggest several tests:

• Blood tests: These are used to check for things like anaemia (a lack of healthy red blood cells), vitamin deficiencies, thyroid issues, or high blood sugar levels.
• Oral swabs: A small cotton bud is used to gently wipe the inside of your mouth to check for fungal infections like thrush.
• Saliva tests: Sometimes, tests are done to measure how much saliva your mouth is producing.
• Other checks: In some cases, your doctor might suggest allergy tests or, very rarely, a small biopsy (taking a tiny sample of tissue) or imaging to rule out other conditions.

If all these tests come back normal, it confirms that the burning sensation is not caused by an infection or a serious disease, and a diagnosis of this condition is made.

Management and Treatment

While there is no single "cure" that works for everyone, there are many effective ways to manage the symptoms. The most important part of treatment is reassurance—knowing that you do not have a serious, life-threatening disease can often help reduce the stress that makes the pain worse.

Medical treatments may include low-dose medications that are typically used for nerve pain. These are not used for their antidepressant effects in this context, but rather to help "calm down" the overactive nerve signals in the mouth. Other options might include specific supplements if a deficiency was found, or adjustments to your current medications if they are contributing to a dry mouth.

Psychological support is also a vital part of treatment. Techniques such as Cognitive Behavioural Therapy (CBT) or Acceptance and Commitment Therapy (ACT) can help you develop coping strategies. These therapies focus on changing how you react to the pain, which can significantly reduce the impact it has on your daily life.

Prevention

Self-care is a powerful tool in managing your symptoms. Small changes to your daily habits can make a big difference:

• Keep your mouth moist: Sip water frequently throughout the day or suck on ice chips. Chewing sugar-free gum can also help stimulate saliva flow.
• Watch your diet: Try to avoid foods that are very spicy, acidic (like citrus fruits or tomatoes), or extremely hot in temperature.
• Choose products carefully: Avoid mouthwashes that contain alcohol, as these can dry out and irritate the mouth.
• Avoid irritants: Tobacco and alcohol can make the burning sensation worse, so it is best to limit or avoid these.
• Manage stress: Since stress can trigger flare-ups, finding ways to relax is essential. Activities like yoga, meditation, or simple physical exercise can be very helpful.
• Keep a diary: Tracking when your symptoms are better or worse can help you identify your own personal triggers.

Outlook / Prognosis

Living with this condition can be challenging, but it is important to remember that it is not a sign of a progressive or dangerous disease. For many people, the symptoms are a long-term part of life, but they often fluctuate. It is very common for symptoms to improve during periods when you are feeling less stressed and more relaxed.

While complete resolution of the symptoms is not always possible, most people find that with the right combination of reassurance, stress management, and occasional medication, they can lead a full and active life. The goal of your care team is to help you find the strategies that work best for you, so that the condition has as little impact on your day-to-day happiness as possible. If you feel your symptoms are affecting your mood or causing you to feel low, please speak to your healthcare team; they are there to support you through the ups and downs of managing this condition.