How Long Are Cold Sores Contagious? The Full Timeline You Need to Know
The first warning sign is usually a tingling sensation—like an electric pulse—along the lip or chin. Within hours, a blister forms, then cracks open into a weeping sore. But here’s the catch: the virus responsible, herpes simplex type 1 (HSV-1), doesn’t wait for the blister to appear before it’s ready to spread. By the time … Read more
