Idiopathic condition: No one knows what causes canker sores. They may be caused by a virus, may be a form of allergic reaction or may result from an auto-immune condition. Nothing cures canker sores or prevents recurrence.
Answered 12/4/2014
3.5k views
A doctor has provided 1 answer
5 doctors weighed in across 2 answers
3 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question