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 ...

Stress is thought to boost the activity of leukocytes, immune cells linked to inflammation throughout the body, including in ...