Mouth Ulcers: When to Get Checked and What Test Results Matter

Mouth ulcers, also known as canker sores, are small painful lesions that appear in the mouth or at the base of the gums. While they are usually harmless and resolve on their own, persistent or severe cases may require medical attention. This article will guide you on when to consult a doctor and which test results to be aware of.

What are mouth ulcers?

Mouth ulcers are small, round sores that develop inside the mouth, often on the inner cheeks, lips, tongue, or floor of the mouth. They can be painful, especially when eating, drinking, or talking. Most mouth ulcers are minor and heal within one to two weeks without treatment. However, some can be larger and more persistent, indicating an underlying health issue.

Common causes of mouth ulcers

Mouth ulcers can be triggered by various factors, including:

• Injury or irritation: Biting the inside of the cheek, dental braces, or poorly fitting dentures can cause ulcers.
• Nutritional deficiencies: Lack of essential nutrients like vitamin B12, iron, or folic acid may lead to ulcers.
• Stress and hormonal changes: Emotional stress or hormonal fluctuations can trigger outbreaks.
• Underlying medical conditions: Diseases like celiac disease, Crohn's disease, or Behçet's disease can cause recurrent ulcers.
• Infections: Viral infections, such as herpes simplex, can result in mouth ulcers.

When to see a doctor

While most mouth ulcers are not serious, you should consider seeing a doctor if:

• The ulcer persists for more than two weeks.
• You experience frequent recurrences of ulcers.
• The ulcer is unusually large or painful.
• You notice other symptoms like fever, diarrhea, or skin rash.
• There is difficulty eating or drinking due to pain.

Tests and results to watch

If you consult a doctor for persistent mouth ulcers, they may recommend certain tests to identify the cause. Key test results to watch include:

• Complete blood count (CBC): This test can identify anemia, which may be linked to ulcers.
• Vitamin and mineral levels: Testing for deficiencies in vitamin B12, iron, or folic acid can help determine if supplementation is needed.
• Celiac disease testing: If gluten intolerance is suspected, specific blood tests can confirm this condition.
• Biopsy: In rare cases, a small tissue sample from the ulcer may be taken to rule out cancer or other serious conditions.

Frequently asked questions

What is the difference between a cold sore and a mouth ulcer? Cold sores are caused by the herpes simplex virus and usually appear outside the mouth, while mouth ulcers occur inside and are not contagious.

Can stress cause mouth ulcers? Yes, stress can trigger or worsen mouth ulcers due to changes in the body's immune response.

Are mouth ulcers contagious? No, mouth ulcers are not contagious and cannot be spread from person to person.

Can diet affect mouth ulcers? Yes, certain foods and nutritional deficiencies can contribute to the development of mouth ulcers.

Is it normal to have more than one mouth ulcer at a time? Yes, it is common to have multiple ulcers simultaneously, especially in cases of underlying medical conditions.

Remember, while this information can guide your understanding, any decisions about your health should be made with your healthcare provider.