The virus that commonly causes cold sores starts reshaping our genome within an hour of infection to boost its own growth, which scientists could take advantage of to treat severe cases.

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 ...

As women transition into menopause their estrogen levels naturally decline. This can cause the most well-known menopause ...

This initial cold sore can be severe, lasting for several days and taking two or three weeks to heal completely. Any subsequent appearances of cold sores are usually less severe, but they often ...

This initial cold sore can be severe, lasting for several days and taking two or three weeks to heal completely. Any subsequent appearances of cold sores are usually less severe, but they often ...

For cold sores, frequent outbreaks or complications like severe pain or eye involvement require professional evaluation. Prescription antiviral medications may be necessary to control symptoms.

Cold sore symptoms. Not everyone with an HSV-1 infection will develop symptoms. The HSV-1 virus typically causes tiny, clear, fluid-filled blisters, typically on just one side of the lips.

While cold sores often heal without intervention, it's important to consult a healthcare provider for outbreaks that are particularly persistent or severe, says Dr. Foyle.

Waking up with a spot on your lip is never a good feeling. Often cold sores or pimples are to blame, though telling the difference isn't always easy. They can look similar on the surface, but ...

Skin cream treats cold sores, but with risks Sept. 14, 2005, 1:09 PM EDT Aldara cream can delay the return of cold sores, but it can cause severe inflammation, according to a report in the journal ...