How long do canker sores last?!
Question: How long do canker sores last?
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Answers:
Best Answer - Chosen by Voters
3-5 days. If it lasts longer then go see a doctor.
My G-friend insisted that I start taking this new pill out for the canker sores I was getting that lasted up to 3-4 weeks, PAINFUL. Well despite their stupid name, the sh** worked, all the way around and they prevent those painful cankers. I'm their new biggest fan. Anyway, it's called The Canker Spanker, no joke - don't get me started on their name.