ColdSoreStages

Health

How Long Does a Cold Sore Last?

Understanding Cold Sores and What Causes Them Cold sores, also known as fever blisters, are small, fluid-filled blisters that typically appear on or around the lips. They are caused by the herpes simplex virus (HSV), which is highly contagious and can be transmitted through close personal contact, such as kissing, or sharing personal items like utensils, towels, or razors. Once…