herpes simplex
"I only had ONE cold sore on my bottom lip right in the middle. I used over 6 home remedies the day I saw a tiny bump with some bubbles, the next day abreva was the only thing I was using and 2 days later I noticed the cold sore as spread underneath my lip. I have over 6 little cold sores. I am so mad I spent $20 on this cream. I am visiting a dermatologist to help me because it's been over a week and all of my cold sores are not gone. You're  better off with home remedies such as the following: ketchup, garlic, tea tree oil, ice, vanilla extract, doterra oils (on guard oil), alcohol, etc. anything that will dry it out. Overall abreva helped me in the past once but now I'm done with it. Over priced and spreads more cold sores, don't buy."