If you see this appearing on your lips, it is a sign of ca….
Cold sores—sometimes called fever blisters—are a common skin issue caused by the herpes simplex virus type 1 (HSV-1). Though usually not dangerous, they’re contagious, often painful, and tend to come back once you’ve had them. That’s because the virus stays in your body for life, hiding in nerve cells and reactivating when triggered. What Brings…
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