herpes simplex
"I get cold sores once or twice a year . The sun usually is the cause. Usually I take acyclovir orally which works great if taken within the first day of the tingle warning sign. This time I was traveling and I had no refills from the pharmacy. After 3 days the herpes popped out on my lower lip. I felt a lot of pain, and I had trouble eating and drinking. I bought Abreva at 10:30 last night. The pain has been reduced dramatically.  The lip still looks horrible , but it feels a lot better. I spent $ 17 on Abreva, but it was worth it. I will refill my  prescription  for acyclovir so that I can take it right away next time I get the tingle after being in the sun . The acyclovir taken orally actually can prevent the herpes from erupting. But if you wait"