Believe it or not Medicated Blistex or Carmax has become my friend when I get a flare-up for the last couple of years I use it on my blisters in my genital area and the blisters are gone within the three or four days. if you think about it the blisters are considered cold sores. Just remember to keep it put up safe away from others so no one else will use it on their mouth. hope it works for you like it does for me
Organic virgin coconut is also not only antibacterial & anti-fungal, but anti-viral. It works wonders, too. Ingesting it & putting it on topically. I use it for everything. Google "benefits & uses of coconut oil". It will amaze you.