Leukoplakia Tongue: Causes, Risk and What Happens Next

Leukoplakia means white patch. It is a diagnosis reached by exclusion: the patch cannot be wiped away, and it is not thrush, a friction mark, lichen planus or another known condition. Our guide on white patches in the mouth explains how these are told apart.

It can be flat and smooth, thick and rough, or mixed with red areas. It is usually painless, which is part of why it goes unnoticed. The tongue's side and underside, and the floor of the mouth, are places where a dentist looks especially closely.

It is not cancer, but it is called potentially malignant, which means a small share of patches change over time. No one can tell by eye which will, so the safe approach is to look carefully and keep watching.

Tobacco in any form is the main cause, including smoking, khaini, gutkha and tobacco-containing paan. Areca nut (supari) chewing and heavy alcohol use add to the risk. These habits are common across Uttar Pradesh, which is why a persistent white patch is taken seriously here. Our guide on smoking and mouth cancer explains the link.

A rough tooth or a denture rubbing the tongue can also cause a thickened white patch. Some patches have no known cause. A patch with red areas mixed in, or one that is thick, rough or ulcerated, needs more urgent attention.

The dentist examines the patch, asks how long it has been there and about tobacco and areca nut, and removes any local irritant such as a sharp tooth. Often a short period of review follows after the cause is removed.

A biopsy is the only way to see what the cells look like. A small piece is taken under local anaesthetic and examined in a laboratory. The result decides what follows: regular monitoring, removal of the patch, or referral to a specialist. A biopsy is routine and does not mean you have cancer.

Treatment is guided by the result. Patches that show changes in the cells are usually removed, and follow-up visits are important because the tongue can develop new patches later.

Quitting is the single most useful thing. Many patches shrink or fade after tobacco and areca nut stop, and quitting lowers the chance of future problems. A doctor can advise on support for giving up, which works better than going it alone.

Do not wait for symptoms. A patch that stays beyond two weeks, a red or white patch with an ulcer, a lump, a patch that bleeds, ear pain on one side or trouble swallowing should be seen promptly. Our guide on the first signs of mouth cancer lists what to look for, and the mouth ulcers page sets out the three-week rule.