3 doctors weighed in:
How long it would take for a mouth ulcer to form. Do they appear rather quickly?
3 doctors weighed in

2 doctors agree
In brief: Quickly
Yes...3-7 days.

In brief: Quickly
Yes...3-7 days.
Dr. Michael Cosenza
Dr. Michael Cosenza
Thank
Get help from a real doctor now
Dr. Andrea Brand
Board Certified,
6M people helped
Continue
107,000 doctors available
Read more answers from doctors