Cold sores, or fever blisters, are precisely herpes simplex virus type 1 (HSV-1) that appear as fluid-filled blisters around ...

You might be familiar with treatments for allergies or the common cold. But what about cold sores? These fluid-filled blisters commonly found on or around the mouth are caused by the herpes simplex ...

Medically reviewed by Katlein Franca, MD In some ways, the features of a cold sore vs. a pimple on the lip line are very ...