Cold sores are herpies symplex...Once you get them ,its permanant.I also suffer from cold sores,but I get gaps of months inbetween each burst.
I use blitz or cymex, you need to put it on as soon as you feel a cold sore develope.The usual tingling feeling you get,the sooner you add the cream the better because it speeds up the process and disapears quicker.Or it may not even appear.
Good luck,i know how you feel :wink: