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What causes fever blisters?
A fever blister located on the lips, mouth, and face is usually caused by the highly contagious herpes simplex type 1 virus. Only a small number are caused by herpes simplex type 2, the type usually associated with genital lesions.
There is no cure for a fever blister. However, there are medications that will relieve the pain and itchiness, and speed the healing of the blister.
See: Herpes labialis (oral herpes simplex)
Studies show that genital herpes simplex virus is common. In the United States, one out of five of the total adolescent and adult population are infected with herpes simplex virus. There are two types of herpes simplex viruses (HSV). HSV type 2 is the one that most commonly causes genital herpes . You can get HSV type 2 during sexual contact with someone who has a genital HSV-2 infection. The infection causes painful sores on the genitals in both men and women. HSV type 1 is the herpes virus that is usually responsible for cold sores of the mouth, the so-called " fever blisters." You get HSV-1 by coming into contact with the saliva of an infected person. However, HSV type 1 can cause genital herpes, usually caused by oral-genital sexual contact with a person who has the oral HSV-1 infection, and HSV type 2 can cause cold sores. Herpes can be treated but not cured. Symptoms appear briefly and then disappear; the disease lies dormant in nerve cells, but it may be reactivated by str...
Article updated and reviewed by David Aronoff, M.D., Assistant Professor, Division of Infectious Diseases, University of Michigan Medical School on May 9, 2005. herpes simplex virus (HSV) and is one of the most common sexually transmitted diseases (STDs). There are two types of HSV, HSV-1 and HSV-2. HSV-1 is usually responsible for cold sores ( fever blisters) of the lips and mouth. HSV-2 is the one that most commonly causes genital herpes . The infection causes painful, ulcerative sores on the genitals in both men and women. However, HSV-1 can cause genital herpes, and HSV-2 can cause cold sores. Genital herpes is common. In the United States, one out of five of the total adolescent and adult population is infected with HSV. Herpes is spread by direct contact with an infected person. For example, if you have genital herpes and have sexual intercourse, you can give your partner genital herpes. If you have oral herpes , you can give your partner oral herpes while kissing, and you can also give i...
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