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Doctor insights on: Do Cold Sores Always Blister

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Why do cold sores always blister?

Why do cold sores always blister?

Location of virus: Herpes outbreaks (cold sores) create viral inclusion bodies in the outer layer of skin (the epidermis). The presence of these viral inclusion bodies disrupts the normal architecture of the epidermis, allowing for the formation of blisters.

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Dr. Heidi Fowler
1,043 Doctors shared insights

Cold Sore (Definition)

Also referred to as fever blisters, cold sores are small, painful fluid-filled blisters that are usually found around the lips. Cold sores are very contagious and can be spread by mouth to mouth contact and can spread to the genitalia and cause genital ...Read more


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How are blisters and cold sores different?

Same: If you are referring to "fever blisters" and "cold sores" they are different names for the same thing, caused by virus (herpes).

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Can cold sores spread to other parts of the body even after the blister stage? Curious

Can cold sores spread to other parts of the body even after the blister stage? Curious

Cold sores: The herpes virus can always spread to different parts of the body, viral shedding is less after the blister stage though.

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Is it possible to have recurrent cold sores that never blister or swell?

Is it possible to have recurrent cold sores that never blister or swell?

Cold sores: Why do you think that you have cold sores? It would be difficult to answer without more information

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Are cold sores and fever blisters the same thing?

Are cold sores and fever blisters the same thing?

Yes: Cold sores and fever blisters are terms people use to describe a viral infection which usually affects the lips. The most common cause is by the hsv1 virus. They can be treated with anti-viral medications. An episode typically lasts about 10-15 days.

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I would like help with my fever blisters (cold sores)?

I would like help with my fever blisters (cold sores)?

Zovirax (acyclovir): Cold sores are caused by herpes virus.they can be treated with oral anti-viral medications available by prescription from your doctor

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Are there any good ways to prevent cold sores and fever blisters?

Are there any good ways to prevent cold sores and fever blisters?

Prevention: 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.

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Can cold sores make you lip swell without any sign of blisters?

Can cold sores make you lip swell without any sign of blisters?

Sometimes: Sometimes but please see your dermatologist for evaluation and to discuss treatment options.

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What is the fastest/best way to get rid of cold sores/ fever blister?

What is the fastest/best way to get rid of cold sores/ fever blister?

Some options: Melissa officinalis or lemon balm (cream) expedites healing of cold sores. It can reduce healing time by half. Studies also show that regular use can help v recurrences. Brief supplementation with lysine 1, 000mg orally three times a day at the onset, can also hasten healing. Your physician can prescribe oral valtrex (valacyclovir).

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Can you get fever blisters or cold sores in your arm pit?

Can you get fever blisters or cold sores in your arm pit?

Yes: Yes you can though rare. It depends on the site of the initial herpes infection.

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How can I I get rid of my fever blisters/cold sores fast?

Cold Sores: Melissa officinalis or lemon balm (cream) expedites healing of cold sores. It can reduce healing time by half. Studies also show that regular use can help v recurrences. Brief supplementation with lysine 1, 000mg orally three times a day at the onset, can also hasten healing. Your physician can prescribe oral valtrexor another antiviral medication. Laser treatments are also used to treat cold sore.

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How to get rid of cold sores and sun blisters on your lips?

Laser can Help: Find a dentist trained with the biolase waterlase, which can dry up the lesions, reduce pain, and speed healing.

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How can I most quickly get rid of fever blisters/ cold sores?

How can I most quickly get rid of fever blisters/ cold sores?

Best RX is TIME: The lesion undergoes a series of changes and heals over 14-21 days--after which the virus goes dormant. Anti-viral drugs based on Acyclovir are available by prescription and can be taken as a preventive med. Otc meds, like abreva, have variable success rates. If they occur frequently, you can take Valtrex (valacyclovir) daily as a preventive measure, but will need a prescription. There is no 'fast' way.

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How come everytime I use Chapstick/lip balm my lips get cold sores/blisters?

How come everytime I use Chapstick/lip balm my lips get cold sores/blisters?

Well: Could be a couple things one you could've used the Chapstick when you had herpes and keep re-infecting yourself. Another possibility is you use the Stick when you're out in the sun and sunburned can cause a flareup of herpes. For specific diagnosis and treatment recommend health visit

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Might holding a warm tea bag on fever blisters/cold sores actually help to heal them?

Cold sores are Viral: I do not know of any value to doing this remedy. It is important to understand the nature of a cold sore or fever blister. These disorders are caused by the herpes virus. The virus can be very easily spread to other parts of your body or to other people through direct contact. I would recommend not putting a warm tea bad on the sore. The risk of spreading the virus is high. Talk to your dentist.

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I got 3 small clear blisters on my bottom lip. I've had cold sores before but never in this area. What could this be?

I got 3 small clear blisters on my bottom lip. I've had cold sores before but never in this area. What could this be?

Herpes (cold sore): Outbreak is the most likely explanation even if you hadn't noticed in this area before, it can still happen there.

Dr. Philip Miller
1,719 Doctors shared insights

Blistering (Definition)

A blister is a collection of fluid under the epidermis. A blistering rash is one in which ...Read more