how long is a fever blister contagious

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My 9 year old keeps getting fever blisters. Why? Are they contagious?

Yes

Blistering
Fever blisters/cold sores are most commonly caused by the HSV1 virus which is very common and found in most people. The virus is contagious and some people are simply more prone to getting the "fever blisters" than others. There are some meds, including topicals that help decrease the duration of the symptoms and provide some relief. Best wishes
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7 hrs after fainting and vomiting, fever blisters appered on my chin. can this still be related to my episode? or herpes? and is this contagious?

Stress

Blistering
"Fever Blisters" are caused by Herpes Simplex and are contagious. We are all exposed to herpes simplex at a young age. Some people continue to have outbreaks during stressful times and with exposure to the sun. Others may never have repeated outbreaks. Your body was stressed due to the vomiting and fainting episode you had. Thus, the outbreak of herpes simplex. Valtrex will treat this.
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How long can a oral medication for fever blisters leave and help inside your body?

Not sure

Lip_blister
Fever blisters or HSV I viral outbreaks can be shortened by immediate use of Zovirax, but if not taken before 48 or so hours into it, it will be of little benefit. I do not know the specific body clearance for the drug, but as it is dosed every 4 hours, I imagine it is cleared rapidly. Medication most helpful if you feel an outbreak coming on, waiting only reduces effectiveness. Good luck!
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What is a good way to cure or prevent fever blisters?

See below

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To prevent cold sores from occurring wash hands often. Maintain a healthful lifestyle (regular exercise, nutritious diet, adequate sleep, keeping stress at bay). Keep lips well moisturized & apply sun screen to the areas that your cold sores normally pop up. Talk with your physician about supplementing with Lysine. Melissa Officinalis or lemon balm can help heal fever blisters.
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Dr. Arlo J. Miller answered:

Need help with fever blisters?

Cold Sores

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Cold sores can be treated with oral antiviral medications. These are cheap and usually quite safe. They can significantly shorten the duration of the cold sore outbreak. If you have frequent outbreaks, these medicines can be taken daily to suppress the outbreaks.
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What can u do for fever blisters?

Usually endure!

Blistering
These are a nuisance. There are topicals to put on them that are over the counter. Your PCP can prescribe topicals and oral medications to treat and help prevent them. These meds are usually anti-virals. They are known to recur and painful, itchy, unsightly and can become problematic. If it is more than a simple case, see your PCP and discuss. Google a reputable web site for more information
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how to get rid of fever blisters?

Valtrex, famvir

Fever
If you have sever or frequently recurrent fever blisters it is vest to treat with oral antiviral for a week to lower the viral count. If recurrences are frequent a preventive dies of medication one to two pills a day will prevent recurrences. Document severity and length of episodes to determine if treatment of this episode or longer term is better gor you,
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Dr. Oscar Novick answered:

What to do about fever blisters?

Fever blisters

Fever-adult
Medication is available by prescription from your doctor
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Where do fever blisters come from?

Fever blisters are…

Cold_sore
…caused by the Herpes simplex virus (usually type 1, but can also be type 2) which is transmitted by contact with an infected person. Lesions don't even have to be visible to transfer virus. Never cured, it hides out in the body until triggered by stress—cold/infxn/ emotional stress/ bright sunlight/etc. Doc can Rx meds to suppress virus & shorten course of symptoms.
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What causes fever blisters on your chin?

Usually

Chin
herpes. Check with your doc about acyclovir or ganciclovir usage.
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