They often shorten the time it takes a cold sore to heal. But they work best if you put them on at the very first sign of an outbreak. Docosanol cream is available over the counter. Acyclovir (Zovirax) cream and penciclovir (Denavir) cream are available by prescription.
Symptoms; How a pharmacist can help; Things you can try; When to get medical help; Treatment from a. Burst cold sore on lower lip that has become a scab .
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Cold sores are blisters around the mouth and nose, caused by the herpes simplex virus.. simplex virus type 1 (HSV-1) and herpes simplex virus type 2 (
Of the two herpes simplex viruses (HSV-1 and HSV-2), cold sores are most. chin, and upper lip, people often refer to them as "cold sores" or "fever blisters.