herpes simplex
"I just had the second worst experience with cold sores. I have had them my entire life. Once I had two of them on my bottom lip in the sixth grade, horrible experience. Anyways. I just had one on my upper lip 2 weeks ago, Then got a cold. (Don't wipe your nose too hard!!) - caused me a minor cold sore, that was gone within a day with Abreva because I caught it soon. And if things couldn't get any better. The next morning I woke up with a fat lip and a nasty cold sore. I suspect it was due to my dry lips. Keep your lips moisturized! Abreva works guys. Trust me. My suggestion?? Pop those blisters and quickly dry them up with a tissue. and put Abreva over the blister for faster results. Think about it-- you're essentially speeding up the work."