At some point in your life, probably in early childhood, the virus was unknowingly passed along to you by someone who already had it. Unfortunately, after you are infected with the cold sore virus, it stays in your body forever and may keep casusing cold sore outbreaks in the future. But unlike viruses that cause a cold or flu, outbreaks caused by the cold sore virus can now be treated with and antiviral such as Denavir. Cold sores are contagious from the moment you feel your first sign or symptom, until they are completely healed.
Many people grind or clench their teeth.
You may not even know you're doing it. The causes are not clear. Stress is one possible cause, but often the reason for the habit is not known. If something isn't done to stop the damage, bruxism may lead to jaw muscle or joint problems and even loss of your teeth. A mouth guard is a plastic device that fits over your teeth.