Herpes Simplex
"I&#039;ve always suspected that when I use abreva, while it may shorten the life of one cold sore, another often developed right after it. It happened this time, so now I&#039;m convinced. I had 3 different spots that took 9 days to heal and now that those are gone, I have another popping up!  I&#039;m thinking you just have to let them run their course- maybe use a lysine product to reduce pain."