White Patches!!: Good day; Consider a Virtual HealthTap Consult or contacting your dentist. They are usually called fever blisters. These cold sores most commenlycaused by herpes simplex (HSV-1). Usually last 7-10 days and medication (Abreva) lessens their intensity and duration.
Answered 7/19/2018
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A doctor has provided 1 answer
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