As we know, cold sores are caused by the HSV-1 virus, which, once infected, will be with us for life – no matter what we do. As such, there’s no cure for cold sores. But that’s not to say we’re always at the mercy of these painful outbreaks. The first thing to do is to try and avoid any personal triggers, be that excess sunlight, dry lips or stress. Prevention is always better than cure.