why does fever blisters or cold sores come from
What Causes Cold Sores and Fever Blisters? Both cold sore and fever blister refer to the lip blisters caused by infections of the Herpes Simplex I virus (not to be confused with Herpes Simplex II, which is generally associated with genital herpes). Cold Sores are viral infections which cause recurrent groups of irritating, even painful blisters on the lips.
Cold sores are caused and spread by saliva infected with herpes simplex virus type 1. These contagious fever blisters, which can linger on or around your mouth for up to a few weeks, are activated by stress, low immunity, or sun exposure. Luckily, you have the natural powers to fight or at least shorten the duration of embarrassing cold sores right in your medicine cabinetâ¦.