Anyone who’s ever developed a cold sore knows just how painful and annoying they can be. Often, the unwelcome guests don’t come unannounced — you’ll often feel the cold sore before actually seeing it.

Which cold sore treatment is best? Whether you call them cold sores or fever blisters, they’re all the same. These painful, itchy bumps that form on the lips and around the mouth make life difficult ...

A mysterious bump near your lips can be unsettling. Is it a harmless pimple or something more serious like a cold sore? Distinguishing between the two is crucial for effective treatment and prevention ...

Add Yahoo as a preferred source to see more of our stories on Google. Cold sores occur around the mouth area and resemble blisters or a cluster of blisters. Carlos Ciudad Photography/Getty Images Cold ...

Cold sores are caused by the herpes simplex virus (HSV) which is often transmitted from person to person during kissing. Once it has infected the body, the virus lies dormant, generally being kept ...

Cold sores are caused by the herpes simplex virus (HSV). Once it has infected the body, the virus lies dormant, but may reactivate and cause a cold sore at any time, especially when the immune system ...