what do fever blisters look like
Cold sores, sometimes called fever blisters, are groups of small blisters on the lip and around the mouth. The skin around the blisters is often red, swollen, and sore.The blisters may break open, leak a clear fluid, and then scab over after a few days. They usually heal after several days to 2 weeks.Cold sores are caused by the herpes simplex virus (HSV) . There are two types of herpes simplex virus: HSV-1 and HSV-2.Both virus types can cause lip and mouth sores and genital herpes. The herpes simplex virus usually enters the body through a break in the skin around or inside the mouth.he skin around the blisters is often red, swollen, and sore. The blisters may break open, leak a clear fluid, and then scab over after a few days. They usually heal after several days to 2 weeks. Cold sores are caused by the herpes simplex virus (HSV) . There are two types of herpes simplex virus: HSV-1 and HSV-2.