What are Cold Sores?
Cold sores are a common viral infection caused by herpes simplex virus type 1 (HSV-1), and herpes simplex virus type 2 (HSV-2). They present as tiny, fluid-filled blisters on and around your lips. After the blisters break, their scab can last several days.
Cold sores spread from person to person by close contact. There’s no cure for cold sores, but treatment can help sores heal more quickly and they may reduce the frequency, length and severity of future outbreaks.