There is a medication existing to reduce the symptoms of the infection that causes cold sores (HSV-1). I think it is usually taken daily, but it might have some use being taken on a when-and-as-needed basis to reduce the outbreaks, that you would take when you can feel the cold sore coming (tingling feeling etc.). If it's really bothering you and the regular methods don't work (reducing stress, changing diet to avoid triggers, doing everything you can not to touch it, etc...) then you might want to talk to your doctor about it. I don't know how it's called.