First, you’re not alone. Up to 80% of American adults have the herpes simplex virus (HSV-1), which can cause cold sores (also known as fever blisters), according to Johns Hopkins. The viral infection ...

Herpes simplex virus (HSV), the virus that causes cold sores, is extremely common. In fact, about two-thirds of people under 50 have it, according to an estimate from the World Health Organization ...

Add Yahoo as a preferred source to see more of our stories on Google. Cold sores are more common than you think. Getty Images Admittedly, cold sores aren't the most pleasant topic of conversation.

While cold sores are not dangerous, they can be irritating — especially if you suffer from frequent outbreaks. Although they most commonly appear around the lips and mouth, cold sores can spread to ...

Q. I have had cold sores for years, generally when I’ve been stressed. While working, I had good insurance and I always used prescription Zovirax cream. Now that I’m retired, this cream is not covered ...