A member asked:

I have a white patch that looks like a canker sore but does not hurt behind my left tonsil.

A doctor has provided 1 answer
Dr. John Chiu answered

How long?: If this has been present for weeks or months, it is likely from scarring from a previous infection. If this is new, give it a couple of weeks to see if it does go away. If you are still concerned, ask your doctor or dentist to take a look at it.

Answered 1/4/2018

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