Leukoplakia
This condition leads to thick, white patches on the tongue and inside the mouth. It is often caused by chronic irritation, such as smoking, alcohol use, or rough teeth. While usually harmless, leukoplakia can sometimes be a precancerous condition, so a doctor should evaluate it if it persists.
Geographic Tongue
This is a benign condition in which patches of the tongue lose their normal coating, creating smooth, red areas surrounded by white borders. The patterns may change over time, and while it is harmless, it can sometimes cause mild discomfort.
Lichen Planus
A chronic inflammatory condition that can affect the inside of the mouth, causing white, lacy patches on the tongue and inner cheeks. The exact cause is unknown, but it is believed to be related to an immune system disorder.
Syphilis
In its secondary stage, syphilis (a sexually transmitted infection) can cause white patches on the tongue and mouth. This condition requires immediate medical treatment with antibiotics.
When to See a Doctor
While a white tongue is often harmless and can resolve with proper hydration and oral hygiene, you should see a doctor or dentist if:
The white coating lasts more than two weeks.
