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A member asked:
My boyfriend has a cold sore he's 19 how long should i wait before i feel like its more den a cold sore?
A doctor has provided 1 answer
2 weeks: A regular cold sore (herpes simplex virus infection) usually lasts about a week or two before fully crusting over. If something is still going on after 2 weeks, or if it continues to worsen, i would want him to see a doctor since other things can cause blisters or sores on the lips.
Answered 9/28/2016
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