Have been plagued with these ever since I had dd two years ago and I have tried everything from LLysine, compeed patches, Tea tree oil, all have had different results. Someone here recommended that light box zapper thing and as I was so desperate last time (only a few weeks ago) I bought one.
I had a nasty looking one rear it's ugly head last night and I zapped it about three times before bed and this morning there is nothing
It's a flaming miracle!
www.boots.com/en/Boots-Advanced-Electronic-Cold-Sore-Treatment_641526/fabbo