I bought this product before cold season but luckily didn't get any cold sores. Later I did get a bad sore on the crease at the side of my nose from scratched pimple. It looked terrible and was oozing as those types of wounds often do before they heal. I used one of the clear patches on it, and it hid it beautifully. After 3 days and 3 patches it was totally healed (which is must faster than normal) Quite a surprising and versatile product!
I love these. They are pretty obvious on your face, but for me it was the only thing that kept the virus from spreading. It spread under the patch but nowhere else. I also like them because they protect the sore so it doesn't get infected, and at night it is great to make sure you don't touch it. Pretty expensive but will keep buying.
These work very well, in my experience. It takes a bit of a trick to get the patch off the strip but, once you get the hang of it, it's fine. The patches last for hours and keep sores from spreading, and speed the healing some.
Patch has no active ingredient, essentially scotch tape cut into circles.