What Are the Causes of Cold Sore Outbreaks?
Cold sores are the result of the herpes virus. According to the Mayo Clinic, herpes simplex virus type 1 is generally associated with cold sores, while genital herpes is often caused by herpes simplex virus type 2. However, either virus can cause cold sores or genital herpes.
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Contracting the Herpes Virus
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Initial exposure to the herpes virus usually occurs during close contact with an infected individual. This can include kissing or contact with skin that is shedding the virus. It can also be spread through contact with shared items such as eating utensils. Once the virus enters the body, it can remain dormant and may re-emerge later.
Active Cold Sores
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Active sores, often resembling blisters, are the most contagious. Sores that have crusted are less likely to spread the virus.
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Cold Sore Outbreaks
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The herpes virus becomes dormant after the first infection passes. The dormant period may last for long periods of time.
Causes of Cold Sore Outbreaks
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Causes of a cold sore outbreak can be unclear. However, outbreaks are sometimes associated with colds or flu symptoms including fevers. This is why cold sores are sometimes referred to as fever blisters. Stress and hormonal changes are also sometimes associated with outbreaks.
Environmental Causes of Cold Sore Outbreaks
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According to the Web site bodyandhealth.canada.com, cold weather can trigger outbreaks of cold sores. Exposure to sunlight and sunburn can also trigger an outbreak.
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