What could cause a persistent white patch on the tongue?

Question

Hello doctor,

I have had a persistent white patch on the side of my tongue for the past few months. It does not hurt and does not go away when lightly wiped. The patch has remained the same size and shape since I first noticed it. I am a non-smoker, and I have visible tartar on my teeth. Could this be leukoplakia, a fungal infection, or something else? Do you recommend a biopsy to rule out precancerous changes? I can provide a clear photo of the lesion.

Kindly help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I read your query and understood your concern.

A persistent white patch on the tongue that does not scrape off and has been unchanged for several months deserves careful attention, especially since it is not related to trauma (like biting) and you have already ruled out obvious irritants like smoking.

Here is a breakdown of possibilities:

Leukoplakia: A white patch on the oral mucosa that cannot be rubbed off and cannot be diagnosed as another specific condition. Some cases are benign, but a small percentage can be precancerous or even contain early cancer cells at the time of diagnosis. Common causes are chronic irritation (tartar buildup, sharp tooth edges, ill-fitting fillings), tobacco, alcohol, HPV (human papillomavirus), but it can occur without obvious risk factors.
Chronic fungal infection (oral candidiasis): The “classic” white patches from Candida usually scrape off, but there is a variant called chronic hyperplastic candidiasis that does not rub off and can resemble leukoplakia. Usually associated with immune changes, dentures, or chronic irritation.
Other causes: Lichen planus (often with a lace-like pattern), scar tissue from past trauma, and, less commonly, early malignancy.

A biopsy is important in your case because:

The patch has persisted for months.
It does not scrape off.
It has remained the same size and shape.
There is no pain or inflammation.
There is no obvious resolving cause.

Please visit an oral surgeon or oral medicine specialist for a biopsy and specific diagnosis. Kindly maintain proper oral hygiene and start taking care of your oral and dental health. Cleaning sessions in a dental clinic on a regular basis will help you a lot in improving your aesthetics and hygiene.

I hope this helps.

Kindly follow up if you have more doubts.

Thank you.