where do fever blisters and cold sores come from?
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Cold sores and fever blisters are caused by the herpes simplex virus type 1 (HSV-1), a virus that passes from person-to-person by direct contact with infected skin or secretions, including saliva. The sores usually appear as clusters of tiny blisters on the lip.
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Craig Austin, a dermatologist in New York City, cold sores usually aren't a sexually transmitted disease (STD). They are caused by the herpes simplex virus.
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A fever blister, or cold sore, can last from 10 to 14 days. Fever blisters usually occur in groups and cause red, swollen, and sore wounds.
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Cold sores, which are small and somewhat painful blisters that usually show up on or around a person's lips, are caused by herpes simplex virus-1 (HSV-1). But they don't just show up on the lips. They can sometimes be inside the mouth, on the face, or even inside or on the nose.
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Cold sores are caused by the herpes simplex virus and shingles is caused by the herpes zoster virus (the same virus that causes chicken pox). Once you are exposed to these herpes viruses, they can remain dormant, usually along the nerves, for many years until your system is weakened by stress or lack of sleep.
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Cold sores are caused by certain strains of the herpes simplex virus (HSV). HSV -1 usually causes cold sores. HSV -2 is usually responsible for genital herpes.
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The most common cause of cold sores is the herpes simplex type 1 (HSV-1), but sometimes the herpes simplex type 2 (HSV-2) can cause it. In the United States (U.S.), between 50 and 80 percent of people have oral herpes, making them potentially susceptible to cold sores.
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Cold sores are small blisters that develop on the lips or around the mouth. They're caused by the herpes simplex virus and usually clear up without treatment within 7 to 10 days. You may not have any symptoms when you first become infected with the herpes simplex virus.
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Cold sores are caused by certain strains of the herpes simplex virus (HSV). HSV -1 usually causes cold sores.
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In the mouth, sores occur on the tongue, gums, and cheek. This condition is known as hand-foot-mouth disease (HFMD) and is caused by group A coxsackievirus. HFMD is most common in children under 10 years of age. HFMD usually causes a sore throat, fever, and the characteristic blister rash described above.
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A cold sore can appear anywhere, but typically crops up around the lips, mouth, and even on or in the nose. In eczema herpeticum, the sores may start in an area of eczema elsewhere on the skin, such as the arms or legs.
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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.
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Cold sores are highly contagious. When a child develops a cold sore for the first time (also called primary HSV), the blisters often spread beyond the lips to the mouth and gums. A child may also have a fever, swollen and tender lymph glands, sore throat, irritability and drooling.
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These sores have become known as cold sores or fever blisters because the virus can be reactivated by a cold or fever. The virus also can be triggered to become active again by other factors, including stress, trauma to the lips, exposure to the sun's ultraviolet rays, menstruation and suppression of the immune system.
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Cold sores are caused by infection with specific strains of HSV. HSV-1 is the strain that most commonly causes cold sores. However, HSV-2, the strain that causes genital herpes, can also cause cold sores. HSV is very contagious.
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When Your Child Has Cold Sores. Cold sores (also called fever blisters) are a common problem in children. They usually appear outside the mouth. Cold sores often begin as 1 or a cluster of blisters, which then crust or scab over.
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Cold sores are most contagious when you have oozing blisters because the virus easily spreads through contact with infected body fluids. But you can spread the virus even if you don't have blisters.