What Causes Cold Sores on the Mouth?

Cold sores are caused by the Herpese Simplex Virus (HSV). There are two types of HSV that can cause cold sores, however HSV-1 is most commonly the cause. HSV-2 is known as genital herpes, but in some cases it hsa been known to cause cold sores when transmitted through oral sex to the face of the person giving oral sex. To find more information click here: