Hi,
The cause of cold sore is the Herpes Simplex Virus Type 1 (HSV-1). After primary infection, the HSV-1 virus becomes latent, usually in the dorsal root ganglia of the trigeminal nerve and may recur. Cold sores are usually seen on the lips and extend to the skin around the mouth. Other areas on the face, chin, or nose are sometimes involved. The ulcers crust over and the skin returns to normal within about 3 weeks without scarring. If it persists or does not heal, it is best that you have this evaluated further for proper management.
Take care and regards.
I have the same problem and I was wondering the same thing, anyone have the answers?? Any answers or suggestions welcome, I hope the scar is not permanent!!