Cold sores, sometimes called fever blisters, are small, fluid-filled blisters. They can form anywhere on the face, but they are most common around the mouth or lips.
They often start as an itching or tingling feeling, followed by a blister about a day later. When the blister breaks, a yellow crusting appears at the site.
You might find them painful and even embarrassing. Luckily, cold sores go away in a week or two and don’t cause scarring.
Cold sores are caused by the herpes simplex virus type 1 (HSV-1), and about two-thirds of people under age 50 may have it, according to the
Take the quiz below to test your knowledge and learn a few key tips and tricks on managing cold sores.