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 ...

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

Cold sores, or oral herpes, are blisters that form on or near the lips, nose, or mouth. In some cases, cold sores can form on the tongue. HSV-1 can transmit between people through mouth-to-mouth ...

As mouth ulcers heal, their whitish color will fade, and any surrounding redness will start to go away. You’ll also feel less pain and burning. This could happen over 1–4 weeks. Mouth ulcers are sores ...

A cold sore is a group of small, painful blisters (ulcers) on your face caused by the herpes simplex virus (HSV). Although they typically show up around the outside of your mouth, you can also get ...

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 ...

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 ...