A cold sore is caused by a virus. Once you get one, you will have them off and on the rest of your life. They can be triggered by stress, or by being around someone else that has an active sore. There are a few creams available in the drug stores. Carmex and Blistex are a couple that come to mind. The best way to handle it is to keep the area moist (even Vasoline will help) until the sore goes down. Most go away in a week to ten days. Try not to pick at it.


