Overview

This condition is a long-term inflammatory disorder that affects the lining of the mouth. It is not an infection, meaning you cannot catch it from anyone else, and it is not contagious. While it can sometimes affect the skin, it often appears only inside the mouth. It is quite common, affecting about 1 to 2 out of every 100 people. It is most frequently seen in women over the age of 40. Because it is a chronic condition, it often lasts for several years, and for many people, it may be a lifelong companion. While it can be uncomfortable, it is important to know that it is not a life-threatening illness.

Symptoms and Causes

Understanding why this happens can be difficult, as the exact reason is not fully known. However, it is widely accepted that the condition is linked to the body’s immune system. In a healthy body, the immune system protects us from germs. With this condition, the immune system becomes overactive and mistakenly attacks the healthy cells lining the mouth, leading to inflammation and soreness.

Symptoms

The way the condition looks and feels can vary from person to person. Some people have very mild cases and may not notice any symptoms at all. For others, the discomfort can be more noticeable. Common signs include:

• White patterns: You might see lace-like white lines or patches on the inside of your cheeks, tongue, or gums. These are often painless.
• Red patches or sores: These areas can look bright red and may be quite tender or painful.
• Ulcers: These are small, open sores that can be very sensitive.
• Sore gums: Your gums may look red, feel tender, and bleed easily, making it difficult to brush your teeth comfortably.
• Burning or stinging: Many people feel a burning sensation, especially when eating or drinking.

You may find that certain foods—such as spicy dishes, acidic items like citrus fruits or vinegar, and hard or crunchy foods like toast or crisps—make the soreness much worse. Highly flavoured foods can also trigger discomfort.

Causes

While the exact trigger is often unknown, the condition is considered an autoimmune issue, where the body’s natural defences are working in a way that causes inflammation. It is not inherited, so you do not pass it down to your children. Sometimes, similar-looking patches in the mouth are not this condition itself, but rather a reaction to something else. These are called "lichenoid" lesions and can be triggered by certain medications, such as those used for high blood pressure or diabetes, or even by materials used in dental fillings, like amalgam (a silver-coloured metal filling).

Diagnosis and Investigations

If you are worried about changes in your mouth, it is important to see a healthcare professional, such as your GP or a dentist. They are experienced in identifying the signs of this condition.

Diagnosis

In many cases, a doctor or dentist can diagnose the condition simply by looking at the appearance of your mouth. They will ask about your medical history and whether you have noticed any specific triggers for your discomfort. Because the white, lace-like patterns are quite characteristic, an experienced clinician can often recognise them immediately.

Investigations

If the appearance of the patches is unusual, or if the doctor needs to be absolutely certain, they may suggest a biopsy. This is a minor procedure where a tiny sample of the tissue is removed under local anaesthetic (a medicine that numbs a small area so you do not feel pain). This sample is then sent to a laboratory to be examined under a microscope. This helps confirm the diagnosis and ensures that the patches are not caused by another condition.

Management and Treatment

Although there is no permanent cure, there are many effective ways to manage the symptoms and make your mouth feel much more comfortable. The goal of treatment is to reduce inflammation and soothe the soreness.

• Topical treatments: These are medicines applied directly to the affected area. Your doctor may prescribe corticosteroid mouthwashes, sprays, or pastes to help calm the inflammation. In some cases, ointments like tacrolimus may be used.
• Pain relief: If the burning is severe, your doctor might suggest anaesthetic mouthwashes to numb the area temporarily.
• Systemic treatments: For very severe cases that do not respond to local treatments, your doctor might discuss stronger medications that work throughout the body to calm the immune system.
• Dental care: If your condition is linked to your dental fillings, your dentist might discuss replacing them. It is also vital to visit a dental hygienist regularly to keep your mouth as healthy as possible.

Prevention

While you cannot prevent the condition from starting, you can take steps to prevent flare-ups and keep your mouth comfortable:

• Oral hygiene: Keep your mouth very clean by brushing your teeth gently twice a day. Use a mild toothpaste and an alcohol-free mouthwash, as alcohol can sting and dry out the mouth.
• Dietary choices: Keep a food diary to help you identify which foods trigger your soreness. Generally, it is best to avoid very spicy, acidic, or hard, crunchy foods.
• Lifestyle: Avoid smoking and limit your alcohol intake, as these can irritate the lining of your mouth.
• Stress management: Some people find that stress can make their symptoms worse, so finding ways to relax can be helpful.

Outlook / Prognosis

Living with this condition is a long-term journey. Unlike skin-based versions of this condition, which often clear up within a year or two, the oral form tends to persist for many years, and sometimes for life. However, this does not mean you will be in pain all the time; many people experience periods where the condition is quiet and causes no trouble at all.

Because there is a very small risk—less than 2% over 10 years—that these patches could change over time, it is essential to attend regular check-ups with your specialist or dentist. They will monitor your mouth to ensure everything remains stable. If you ever notice a rapid change, such as a new lump, a sore that will not heal, or unexplained bleeding, you should contact your doctor promptly for an urgent review. By staying proactive and following your treatment plan, you can effectively manage the condition and maintain a good quality of life.