cold sores
"After battling a cold on top of a stressful week, I woke up Saturday morning with a tingling spot on my lip. Checked the mirror and saw a little white bump.  I ran to the med cabinet, and took the first dose of Valacyclovir.  I kept an eye on it throughout the day.  It got a little red, but no swelling and no blisters formed.  I took the second dose before I went to sleep and woke up the next day and it was a little red spot, that was it.  It's now Tuesday and it's almost completely healed.  I don't know why I waited so long to use this stuff (been getting cold sores since high school, I'm 27 now).  I don't even bother with Abreva anymore."