What Is a Cold Sore? A cold sore is a group of tiny, painful blisters caused by the herpes simplex virus (HSV). They're also called fever blisters or herpes simplex labialis. Up to 90% of people ...

It can be tempting to pop a cold sore. However, popping a cold sore releases infectious fluid from inside the blister, increasing the risk of further cold sores, infection, and scarring. In this ...

Cold sores are blisters that can develop on the lips or around the mouth when a person has the herpes simplex virus (HSV). There is currently no cure, but there are treatment options to help control ...

Anyone who has suffered from a cold sore outbreak can attest that the experience is far from pleasant. A small canker-like sore develops somewhere on the lip, and it continues to grow and become more ...

Wondering how to get rid of a cold sore? Although these normally clear up on their own, cold sores can be painful while they ...

Canker sores form inside the mouth on soft tissues like gums, cheeks, or under the tongue, and are not contagious. Cold sores usually appear on or around the lips and are caused by herpes simplex ...

Mouth ulcers are common and often harmless, but when a sore refuses to heal beyond two weeks, it could be your body’s way of raising a red flag. Health experts warn that persistent mouth sores should ...