Colds Aren’t to Blame
Cold sores, despite the name, are not caused by the common cold. They are caused by a virus, specifically, the herpes simplex virus (HSV). Cold sores are contagious and are passed to others through direct contact or contact with body fluid. There are two different types of HSV- type 1 and type 2. Type 1 HSV usually caused cold sores. As the virus reproduces, it damages the skin and leads to blister formation that lasts about a week. In between outbreaks of cold sores, the virus remains present in the body inside nerve cells.