United Arab Emirates
A 23-year-old female asked:
Tried everything canker sore does not disappear. i have them on my lips,tongue, gums, everywhere im unable to eat or drink please help i am suffering?
1 doctor answer • 1 doctor weighed in

Dr. John Chiuanswered
Allergy and Immunology 58 years experience
How long?: Canker sores usually resolve in less than a week. If you have persistent sores, you need to get an evaluation by your doctor to find out what the cause is.
862 viewsAnswered >2 years ago
Last updated Dec 9, 2016
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