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A member asked:
Is a cold sore infectious if it doesn't blister?
A doctor has provided 1 answer
Yes: A cold sore is infectious in all phases but is most infectious when a scab breaks open & fluid with virus weeps from it.
Answered 11/27/2020
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Related Questions
A member asked:
I have had a cold sore for a really long time. This is about day 20 but I don't know if it's still there. It went through all the stages of blisters, crusting, and scabbing but now all of that is gone and my skin is pink and smooth but it feels thicker wh
2 doctors weighed in across 2 answers
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What works against the cold sore while it is still a blister?
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