I have been plauged with sores on my lips since getting kissed in high school by a guy who had a sore (I remember noticing it but didn't know what it was). I tried every prescribed medication but never really found relief, especially after the sore erupted. Over the years, I have experienced fewer outbreaks and I attribute that to: eating healthier, developing better ways to cope with stress, and including l-lysine and lemonbalm in my supplement regimine. As soon as I feel that tight, tingly spot in my lip, I load up (just about triple) my dose of the l-lysine and lemonbalm, and the outbreak doesn't come through. This has been a terrible week (including the death of a family member) and I missed that tight, tingly feeling. Today, I have blisters. I've read and read and read everyone's posts. I'm trying the hydrogen peroxide treatment and calling in sick to work. I'llbe happy to post the outcome later, but I wanted to let you guys know what I've found that prevents the sores to begin with. Research for your self to determine the best dosages and frequency of before you begin any herbal supplementation, but I personally attest to the effectiveness of this regimine.