herpes simplex
"I've had cold sores my entire life. I have been on prescription pills to keep the cold sores from becoming too bad! Then I found Abreva. It works so well with the pills. I use it on the first sign a cold sore. I also put some rubbing alcohol on a Q-tip and apply it on the first sign. This usually stops the blister from ever occurring! I would buy Abreva again."