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A member asked:
I've had fever blisters in the past. had a root canal a week and a half ago for dental abscess. now i woke up with fever blister. is this common?
5 doctors weighed in across 2 answers
Not uncommon: "fever blisters" or cold sores on the lips, are extremely common, and due to a type of herpes simplex virus (not genital herpes). When our immune system is down (as in during a cold or other infection/tooth abscess) or we are under a lot of stress (anxiety) then the virus can activate and form the blister.
Answered 10/4/2016
3.5k views
Could be: Stress, like that form a root canal, has been known to cause "cold sores" to come out.
Answered 11/12/2014
3.5k views
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