What Virus Causes Cold Sores?

Almost everyone knows what a cold sore is. However, many people are unaware what causes cold sores to develop. Cold sores are caused by the herpes simplex virus (HSV). The HSV virus has two different types – HSV-1 and HSV-2 – although most cold sores are caused by...

How Does Sun Exposure Affect Cold Sores?

Cold sores, caused by the HSV-1 virus, can be very common and triggered by different environmental or health causes throughout a person’s lifetime. One of the main concerns that can trigger a new cold sore to flare up is exposure to sunlight.1 Although it is not known...