Cold sores are painful blisters or bumps that form on your lips or around your mouth due to a herpes simplex virus 1 (HSV-1) infection. They typically resolve on their own after a couple of weeks, but can recur.
What are cold sores?
Cold sores are painful blisters or bumps that form on your lips or around your mouth due to a herpes simplex virus 1 (HSV-1) infection. They typically resolve on their own after a couple of weeks, but can recur.