E-mail Contact Us Volunteer Make A Gift En Español Employees  
Health Library > Search Topics

Search Topic

Language Choice

Canker sore

Canker sore on the inside of the lip

A canker sore is a painful white ulcer in the mouth. They appear most often on the tongue, inside of the cheeks, and inside of the lips. Unlike cold sores, canker sores are not contagious. But in some people they keep coming back. Canker sores cause pain that may make it difficult to eat or drink.

ByHealthwise Staff
Primary Medical ReviewerKathleen Romito, MD - Family Medicine
Martin J. Gabica, MD - Family Medicine
Adam Husney, MD - Family Medicine
Arden G. Christen, DDS, MSD, MA, FACD - Dentistry

Current as ofMarch 28, 2018

Contact Us:

1-888-LGH-INFO (544-4636) Have a question?
Follow us online.