LEARN ABOUT COLD SORES.
A cold sore is a blister that forms on or around the lips and is usually caused by HSV-1.
Most cold sore sufferers aren't exactly sure when they first encountered the virus because HSV-1 is usually contracted early in childhood.
During a cold sore outbreak, which often occurs after you have experienced one of the cold sore triggers, the virus "wakes up" and infects the skin cells in or around your lip or mouth, eventually becoming a visible and contagious sore.
But when you use Abreva® cream at the very first tingle, you'll help shorten the healing time of your cold sore. That's because Abreva cream is the only FDA-approved, over-the-counter cold sore medicine that actually blocks the virus from getting to healthy cells. In fact, only Abreva cream can knock out your cold sore in as few as 2½ days.*