Why do I have a white patch on my tongue?
Ask the doctor
Q. I have a white patch on my tongue. What could it be?
A. There are many possible causes of a white patch on the tongue.
Here are some common reasons:
- A dry mouth. This could be from prolonged mouth breathing, dehydration, certain medications, and some medical conditions.
- Inflammation of the tongue. This is called glossitis.
- Overgrowth of yeast. This is called thrush. It happens more often in people that have been on an antibiotic or have an impaired immune system.
- Infection with human papilloma virus (HPV) or other virus. This is especially true in people with compromised immune systems.
- Leukoplakia. This is a white coating from persistent irritation, such as from smoking or ill-fitting dentures. Sometimes it can be precancerous.
- Oral lichen planus. This is an autoimmune disorder. The immune system gets tricked into attacking the lining on the tongue.
If the white patch persists, you should definitely see your doctor or dentist to help sort out the cause.
Image: © Sergio Mendoza Hochmann/Getty Images
About the Author
Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing; Editorial Advisory Board Member, Harvard Health Publishing
Disclaimer:
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.
