Cold sores are caused by a contagious virus called herpes simplex virus (HSV). There are two types of HSV. Type 1 usually causes oral herpes, or cold sores. Type 1 herpes virus infects more than half of the U.S. population by the time they reach their 20s. Type 2 usually affects the genital area.
Some people have no symptoms from the infection. But others develop painful and unsightly cold sores. Cold sores usually occur outside the mouth, on or around the lips. When they are inside the mouth, they are usually on the gums or the roof of the mouth. They are not the same as canker sores, which are not contagious.
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- Cold Sores (National Library of Medicine)Cold sores are caused by a contagious virus called herpes simplex virus (HSV). There are two types of HSV. Type 1 usually causes oral herpes, or cold sores. Type 1 herpes virus infects more than half ...
- ... small, painful blisters commonly called cold sores or fever blisters. Oral herpes is also called herpes labialis. ... the face. Sometimes, the virus later reactivates, causing cold sores. Herpes virus type 2 (HSV-2) most often ...
- A fever blister is a sore from an infection caused by the herpes simplex virus, characterized by an eruption of ... gums, or the skin around the mouth. A fever blister is highly contagious. A canker sore is a ...
- Cold Sores/Start Here ... Cold Sores ... National Institute of Dental and Craniofacial Research ... From the National Institutes of Health
- Acyclovir cream is used to treat cold sores (fever blisters; blisters that are caused by a virus called herpes simplex) on the face or lips. Acyclovir ointment is used to ...
- ... used to treat herpes labialis (cold sores or fever blisters; blisters that are caused by a virus called herpes simplex) on the face or lips. Acyclovir is ...
- ... repeat outbreaks of herpes virus cold sores or fever blisters in people with a normal immune system. Famciclovir ... famciclovir is used to treat cold sores and fever blisters, it is usually taken as one dose at ...
- ... may provide some relief of canker sores and fever blisters, especially if applied when the sore first appears. To help cold sores or fever blisters, you can also apply ice to the sore. ...
- Herpes Simplex Virus (Cold Sores) (American Academy of Pediatrics)Cold Sores/Children ... Cold Sores ... Herpes Simplex/Children ... Herpes Simplex ... American Academy of Pediatrics ... blisters~ lips~ herpes simplex virus~ cold sores~ cold ...
- Cold Sores (Orofacial Herpes) (VisualDX)... orofacial herpes simplex, herpes labialis, cold sores, or fever blisters, is a common infection caused by the herpes ...
(National Institute of Dental and Craniofacial Research) 