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Glossitis – Causes, Symptoms and Treatment

Glossitis is an inflammation of the tongue that can cause swelling, pain, and changes to the tongue surface. It may occur acutely or as a chronic condition.

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Things worth knowing about "Glossitis"

Glossitis is an inflammation of the tongue that can cause swelling, pain, and changes to the tongue surface. It may occur acutely or as a chronic condition.

What is Glossitis?

Glossitis refers to inflammation of the tongue, which can present as redness, swelling, pain, and changes in the appearance of the tongue surface. In some cases, the small bumps on the tongue known as papillae disappear, leaving the tongue with a smooth, glossy appearance. Glossitis is not a disease in itself but is often a sign of an underlying condition that needs to be identified and treated.

Causes

Glossitis can have a wide range of causes. The most common include:

Nutritional deficiencies: Lack of vitamin B12, folic acid, iron, or zinc is a frequent cause of tongue inflammation.
Infections: Bacterial, viral, or fungal infections – such as oral thrush caused by the Candida fungus – can lead to glossitis.
Allergic reactions: Certain foods, oral hygiene products, or medications may trigger an allergic response affecting the tongue.
Physical irritation: Sharp tooth edges, ill-fitting dentures, or repeated biting of the tongue can cause chronic irritation.
Chemical or thermal exposure: Spicy, hot, or acidic foods and drinks, alcohol, and tobacco can irritate the tongue lining.
Systemic diseases: Conditions such as anemia, celiac disease, inflammatory bowel disease, or autoimmune disorders can cause glossitis as a secondary symptom.
Medications: Certain antibiotics and other drugs may irritate the oral mucosa and contribute to tongue inflammation.

Symptoms

The symptoms of glossitis can range from mild to severe and may include:

Redness and swelling of the tongue
Pain or a burning sensation, especially when eating or speaking
A smooth, shiny tongue surface due to loss of papillae
Difficulty chewing or swallowing
Changes in taste perception
In severe cases, difficulty breathing due to significant swelling

Diagnosis

Glossitis is typically diagnosed through a physical examination of the mouth and tongue. A doctor will assess the appearance of the tongue and take a detailed medical history. Additional investigations may include:

Blood tests to check for nutritional deficiencies (e.g., vitamin B12, iron, folic acid) or signs of systemic disease
Swab cultures from the tongue surface if a fungal or bacterial infection is suspected
Allergy testing if an allergic cause is considered
In rare cases, a biopsy may be taken to rule out more serious conditions

Treatment

Treatment of glossitis depends on the underlying cause:

Nutritional deficiencies: Targeted supplementation with missing nutrients such as vitamin B12 injections, iron supplements, or folic acid tablets
Infections: Antifungal medications for fungal infections, antibiotics for bacterial causes, or antiviral agents for viral infections
Allergic reactions: Avoidance of the triggering substance, and if necessary, antihistamines or corticosteroids
Oral hygiene: Gentle and regular oral care, and avoiding irritants such as alcohol, tobacco, and spicy foods
Physical causes: Adjustment of dentures or treatment of sharp tooth edges by a dentist

In most cases, glossitis resolves completely once the underlying cause has been addressed. Pain relief medication or topical anesthetics may be used short-term to manage discomfort.

When to See a Doctor

Medical attention is recommended if tongue symptoms persist for more than two weeks, are severely painful, involve noticeable changes in the appearance of the tongue, or if significant swelling affects breathing or swallowing. Persistent tongue changes should always be evaluated by a healthcare professional to rule out serious underlying conditions.

References

Neville, B. W. et al. - Oral and Maxillofacial Pathology, 4th edition, Elsevier (2016)
Scully, C. - Oral and Maxillofacial Medicine: The Basis of Diagnosis and Treatment, 3rd edition, Churchill Livingstone (2013)
World Health Organization (WHO) - Oral Health Fact Sheet, available at: https://www.who.int/news-room/fact-sheets/detail/oral-health

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