herpes simplex
"I have been using abreva for four days. The second day I noticed it was getting better. Today on the fourth day I noticed that smaller bumps around my cold sore are starting to form. It made my cold sores smaller but now I have to deal with what it caused. Very disappointed because having a cold sore isn't pretty. Just when I thought it was getting better, something else pops up. It was very expensive so I was really looking forward to a better  experience."