Abreva
"I typically don't get cold sores. I've only had 3-4 in my whole life, and they began when I was 25 years old. I get them every 1-2 years. I chose to use Abreva because it alleviates the pain, and is supposed to help with healing time. The Abreva in the US now comes in a pump form, and is much more liquid than the original. Abreva never cured my fever blisters in the 2.5 days they say it can, but it did used to help. This time, it exacerbated my blister, and it is HUGE! It has not spread like the other reviews have stated, but it's larger than normal, and I can only imagine that it's the Abreva I've been using 5-8 times a day. Do not use this product. It either doesn't work, or it makes it worse. Both are bad scenarios. Use vanilla extract."