Medically reviewed by Katlein Franca, MD Key Takeaways Cold sores form clusters of fluid-filled blisters at the lip line that ...

Medically reviewed by William Truswell, MD Cold sores are contagious and spread through contact, such as kissing and sharing ...

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 their ...

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 ...

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 ...

A cold sore is an infection caused by the herpes simplex virus (HSV), and appear as fluid-filled blisters that develop on the lip or around the mouth, according to the American Academy of Dermatology ...

Mouth and lip sores are often caused by an injury, medical condition or sometimes herpes simplex virus. Learn how to soothe ...