1 doctor weighed in:

What causes cold sores?

1 doctor weighed in
Dr. Heidi Fowler
Psychiatry

In brief: HSV1

Cold sores are painful liquid filled blisters that can occur on the lips, roof of the mouth or the gums which are caused by the herpes simplex virus (hsv-1).
An estimated 80% of americans have been exposed to herpes simplex virus type 1. However, not all of those people will get cold sores. It depends on your immune system.

In brief: HSV1

Cold sores are painful liquid filled blisters that can occur on the lips, roof of the mouth or the gums which are caused by the herpes simplex virus (hsv-1).
An estimated 80% of americans have been exposed to herpes simplex virus type 1. However, not all of those people will get cold sores. It depends on your immune system.
Dr. Heidi Fowler
Dr. Heidi Fowler
Thank
Read more answers from doctors