Oral ulceration: understanding and treating these oral lesions

We've all experienced it: a small sore in the mouth that stings, burns, and ruins our day . These mouth ulcers, as they're called, are actually deeper lesions than a simple irritation of the mucous membrane . They can make eating, speaking, or even brushing our teeth difficult. And when they persist, they can become a cause for concern.

In most cases, this ulceration is benign, but it's important to distinguish it from a canker sore or a small cut, and above all, to know the right steps to take to soothe the pain and prevent it from recurring. We'll explain everything in this article.

In simple terms, a mouth ulcer is a small open sore on the mucous membrane . In practice, the thin protective layer inside the mouth is damaged, exposing the tissue beneath. This results in an area that is often reddish, whitish, or yellowish, sometimes surrounded by a faint red, irritated ring .

These lesions can form almost anywhere: inside the cheeks, on the tongue, on the gums, on the palate, or inside the lips. They are usually sensitive , even very painful, and one can have one or several, more or less superficial.

These words are often used interchangeably, but they don't quite mean the same thing.

• Oral ulceration refers to an erosion of the mucous membrane, whatever its origin.

• An aphtha is a specific type of ulcer, most often benign, which tends to recur. It is recognizable by its whitish base and well-defined edges.

• A sore in the mouth is usually caused by an impact or friction and heals fairly quickly once the cause is removed.

In summary: all canker sores are ulcerations, but the reverse is not true . This is a useful distinction to know, as it can guide how to treat them and indicate whether or not it is best to consult a doctor.

They are related to your oral environment or your daily habits. For example:

• A small shock or friction : an accidental bite, a prosthesis rubbing, a poorly fitted dental appliance or a chipped tooth.

• Brushing too vigorously or with a worn toothbrush.

• A burn from food or drink that is too hot.

• Irritation due to a product : highly alcoholic mouthwash, aggressive toothpaste or whitening products.

• Tobacco, which weakens tissues and slows down healing.

• Insufficient oral hygiene, which can perpetuate inflammation.

In these cases, the ulceration is often a single lesion and clears up on its own within a few days once the cause is eliminated. But if the irritation persists, the lesion can linger and become chronic.

Sometimes, these mouth sores reveal a more general problem. They may then be recurrent, multiple, or accompanied by other symptoms.

• Recurrent mouth ulcers , often linked to stress, fatigue or deficiencies.

• Nutritional deficiencies, particularly in iron, vitamin B9 or B12.

• Certain infections, viral or bacterial.

• Inflammatory or autoimmune diseases .

• Side effects of medications, such as certain chemotherapy treatments.

• More rarely, precancerous or cancerous lesions .

In this case, the ulcerated tissues can be more stubborn, painful, and accompanied by other symptoms such as fever, extreme fatigue, or difficulty swallowing . It is important to consult a healthcare professional for an evaluation.

Most of the time, a canker sore or ulcer in the mouth is indicated by fairly typical symptoms:

• A localized pain , often sharp when eating or brushing teeth.

• A burning or tingling sensation , even without doing anything.

• A small, clearly visible lesion , usually round or oval, with a white, yellowish, or red center.

• A red and inflamed area all around.

• Difficulty speaking, chewing or swallowing, depending on where it is located.

These symptoms are usually strongest in the first few days, then they gradually subside as the mucous membrane repairs itself.

Some manifestations deserve special attention, as they may reveal a more serious cause.

• An ulcer that does not heal after two weeks .

• A lesion that is growing larger or deeper .

• Intense and continuous pain that does not subside with usual treatments .

• Bleeding that occurs spontaneously or repeatedly.

• The appearance of several ulcerations at the same time .

• General symptoms such as fever, extreme fatigue, or weight loss.

• Difficulty swallowing or opening the mouth.

In these cases, the ulceration should not be taken lightly and a doctor or dentist should be consulted quickly.

When dealing with a small, isolated ulcer, one can begin by treating the area directly . The idea is to relieve discomfort and create an environment conducive to healing.

• Antiseptic gels or solutions to prevent bacteria from establishing themselves.

• Anesthetic or pain-relieving gels , for temporary relief.

• Special dressings that form a protective film over the canker sore.

• Alcohol-free mouthwashes, for short-term use.

These products are usually applied several times a day, especially after meals and brushing teeth.

If the ulcerated tissue is extensive, recurs frequently, or appears to be related to another health problem, medical treatment may be necessary. This may include:

• Prescription topical anti-inflammatories .

• Treatments against a fungus or virus , if an infection is identified.

• Vitamin or iron supplementation in case of a proven deficiency.

• An adjustment of your medication if the mouth ulcer is a side effect.

It is essential to consult a doctor or dentist in these cases. Self-medication may be inappropriate, and follow-up appointments ensure that everything returns to normal.

Alongside treatment, a few simple habits can really make a difference to your comfort and speed up healing:

• Set aside acidic, spicy or hot foods .

• Opt for a gentle diet for a few days.

• Maintain good oral hygiene , but gently.

• Drink plenty of water to keep your mucous membranes hydrated.

These tips do not replace medical advice if needed, but they greatly contribute to feeling better and seeing this small wound disappear faster.

Most of the time, it follows a fairly classic scenario: the pain increases for a day or two, then the wound remains sensitive for a few days before starting to heal.

• For a simple ulcer (minor injury, common canker sore): healing usually takes between one and two weeks. Sometimes less if irritants are avoided and the ulcerated tissues are protected.

• If the lesion is "maintained" (repeated friction, overly vigorous brushing , tobacco): healing can be delayed because the mucous membrane does not have time to repair itself.

• When it is linked to a medical cause (deficiency, inflammatory disease, treatment, infection): the sores may last longer, recur often, or be accompanied by other symptoms.

If there is no clear improvement after two weeks, it is best not to remain without medical advice.

Most mouth ulcers or small sores are harmless. But in some cases, it's best not to wait too long. Make an appointment with your dentist or doctor if:

• The lesion does not heal after two weeks.

• The pain is severe, constant, or worsens despite what you have tried.

• The wound enlarges, deepens, or changes in appearance .

• She bleeds spontaneously.

• Several ulcerations appear at the same time or recur frequently,

• You have other symptoms such as fever, unusual fatigue, or weight loss .

• You are experiencing difficulty swallowing, speaking, or opening your mouth.

Pay particular attention if you smoke , have a weakened immune system, or are undergoing certain treatments . In these situations, any unusual or persistent oral lesions should be reported promptly.

While it's difficult to avoid them completely, a few simple habits can help prevent them and limit their recurrence. Here are some tips to incorporate into your daily routine:

• Adopt a gentle and regular brushing routine , without rubbing too hard.

• Choosea suitable toothbrush and remember to change it as soon as the bristles wear out.

• Beware of very aggressive toothpastes or mouthwashes, especially those containing alcohol.

• If you wear braces or dentures, make sure they fit properly to avoid rubbing.

• Tobacco doesn't help : it weakens the mucous membranes and slows down healing.

• A balanced diet is key to avoiding deficiencies, particularly in iron and B vitamins.

• Listen to yourself: stress and fatigue are often triggers for recurring mouth ulcers.

If, despite everything, the mouth ulcers often recur or take a long time to heal, do not hesitate to talk to your doctor or dentist.