Cold sores, also known as fever blisters, are far more common than most people realize—and they’re not just a cosmetic nuisance. Caused primarily by the herpes simplex virus type 1 (HSV-1), and in some cases HSV-2 through oral-genital transmission, these small lesions can tell us a lot about the body’s overall health. While they typically heal on their own within 7 to 10 days, the virus remains in the body for life, lying dormant until triggered again.
The contagious nature of cold sores is one of the biggest reasons doctors emphasize caution. They spread easily through direct contact such as kissing, but also indirectly through shared items like utensils, towels, razors, or lip balm. Even touching an active sore and then placing your hand on another part of your body can transfer the virus, which is why outbreaks can sometimes spread to the nose, cheeks, or even eyes.
A typical outbreak follows a predictable cycle. Many people first notice a tingling, itching, or burning sensation around the lips a day or two before anything becomes visible. This is the virus beginning to reactivate. Soon…
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