I Have a White Patch in My Cheek β Is It Bad?
Noticing a white patch inside your cheek can be unsettling. Let's look at what it might be and when it needs attention.
White patches in the mouth are fairly common, and most are not dangerous. Possible causes include:
- Friction keratosis β a thickened area where your teeth or cheek rub together, completely harmless
- Cheek biting (morsicatio buccarum) β a common habit that creates white, ragged-looking tissue
- Oral thrush (candidiasis) β a fungal infection that looks like creamy white patches that can be scraped off; more common after antibiotics or with dry mouth
- Lichen planus β an immune condition that creates white lacy patterns on the cheeks, usually not serious
- Leukoplakia β a thickened white patch that cannot be scraped off; this one needs a dentist's evaluation because a small percentage can be precancerous
What to Look For
- Usually not serious:
- Patch that appears where your teeth rub against your cheek
- White areas that come and go
- Patch that can be gently scraped off (likely thrush)
- Lacy white pattern on both cheeks (likely lichen planus)
- Worth having checked:
- A white patch that does not scrape off
- Patch that has been there for more than 2β3 weeks
- Area that feels rough, firm, or thickened
- Patch that is growing or changing appearance
- Having both red and white areas mixed together (erythroleukoplakia)
When to See a Doctor
- See a dentist or doctor if:
- The white patch lasts longer than 3 weeks
- You cannot scrape it off with gentle pressure
- The area feels hard or different from the surrounding tissue
- You also have a sore, lump, or red patch elsewhere in your mouth
- You smoke or drink heavily β these increase your risk