About once every other year I might get a cold sore and I hate them! Usually after a really stressful situation I can almost immediately feel it coming on, it is always in the same exact spot. Needless to say I have tried a wide variety of treatments and nothing you do will really speed up the process, but you can at least make them a little more bearable. I can remember Campho-Phenique as a child, it came in a tiny green bottle and the camphor smell was horrid. The medicated Campho-Phenique has the same smell but is is a gel formula that you can squeeze onto your finger tip and apply where needed. If you ever mistakenly get any in your mouth it is disgusting. All that I can see that this does that makes it worth using is it does dry out the cold sore quicker and numbs it a little bit. It can be used 2 to 3 times a day. I do keep this on hand and it does do what it claims to, but I really hate the tatse and smell of it.