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Doctor insights on: Causes Of Armpit Blister

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Axilla (Definition)

Area of human body directly under the joint where the shoulder connects to the arm. It contains axillary vessels, brachial nerve plexus, lymph nodes & vessels, axillary ...Read more


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For about 11 years I have gotten painful blister like bumps on my inner thighs and armpits. Multiple drs don't know what the cause is. Any ideas?

For about 11 years I have gotten painful blister like bumps on my inner thighs and armpits. Multiple drs don't know what the cause is. Any ideas?

See your doctor: Painful blisters needs to be seen by your doctor to document location, size, and type of bumps/blisters. If needed, they can do a scrape biopsy to find out what it is. By itself, it's hard to determine, and you may be referred to a dermatologist who can pinpoint it right away and take care it. It's impossible to determine without seeing it in person, by your doctor first. ...Read more

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What could cause a blistering armpit rash?

What could cause a blistering armpit rash?

Allergic reaction: Personal care items like deodorants or body creams can some times cause allergic reactions with blistering. If it is only on one side and painful consider a viral infection. ...Read more

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Causes of blood blister on arm?

Causes of blood blister on arm?

Have it looked at: There are many types and causes of blisters. Several types of inflammatory conditions of the skin, allergic reactions, and sometimes bacterial, viral or fungal infections and insect bites can cause blisters on the skin. Have it evaluated by a professional and get the appropriate treatment. ...Read more

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My son has just got a blister type rash on his arm. Possible causes?

My son has just got a blister type rash on his arm. Possible causes?

Many possibilities: blistering rashes can be from many causes. Infections, burns, skin contact with certain substances or chemicals, are just a few broad possibilities. Definitive dx would require a picture and examination, possibly further testing. Start with your pediatrician. ...Read more

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I had shoulder surgery and now I have blisters all over my arm and underneath it. What is the cause and how do I fix it?

I had shoulder surgery and now I have blisters all over my arm and underneath it. What is the cause and how do I fix it?

Depends: Blisters immed after surgery usually secondary to excessive tension on superficial layers of skin. This may be caused by swelling alone or surgical tape placed in excessive tension to secure bandage. If this seemed to develop later could be superficial skin infection or cellulitis especially if area seems to be expanding. If this is the case should be evaluated by your surgeon. ...Read more

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Four welt like spots on inner left arm, one welt now starting to blister---causes?

Four welt like spots on inner left arm, one welt now starting to blister---causes?

Welts: Most common cause would be an allergic response. They also can be cause by systemic diseases and autoimmune diseases. Start with your regular doctor who may then send you to an allergy/immunology doctor. ...Read more

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My mum has small like blisters on her arm (randomly) until on the above surface of her fingers.What is the cause of it and what treatment can be used?

My mum has small like blisters on her arm (randomly) until on the above surface of her fingers.What is the cause of it and what treatment  can be used?

Blisters: Blistering is nonspecific and needs to be seen by the doctor in order to make an appropriate diagnosis. Often, they will resolve on their own, but best seen by a doctor for treatment advice. ...Read more

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Woke up with painful small blister on arm.. Red around blister, mild pain/discomfort, arm sore/aches. What could cause this?? How to treat blister?

Woke up with painful small blister on arm.. Red around blister, mild pain/discomfort, arm sore/aches.  What could cause this?? How to treat blister?

Have physician exam: Without seeing it, it requires some speculation. A blister can arise from a burn. Raised similar appearing lesions may arise from contact dermatitis, an insect bite or a skin infection. Your description of redness in the skin surround the 'blister' with tenderness are signs of infection. What you are seeing could be an abscess, spreading to further involve the soft tissue around it. See you doctor ...Read more

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Can IV damage cause recurring blood blister on fingertip w pain & tenderness throughout arm? Years after IV damage was done? This happens evry 6-9 mos

Can IV damage cause recurring blood blister on fingertip w pain & tenderness throughout arm? Years after IV damage was done? This happens evry 6-9 mos

Not likely: IV damage to a vein in the distant past leaves a scarred vein, but wouldn't cause recurring finger tip lesions. It's best to have a physician examine the lesion when they are present and then get his or her advice after the evaluation. ...Read more

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Shoulders sunburn w/blisters all over burn area. Very painful. Not able to lift or bend arms. Moving arms causes stinging. Pain down arm w/no sunburn

2 degree burn: You have a significant sun burn at least second degree with blistering. Don't pick the blisters apply cool compresses and if things get worse, it becomes even more swollen and tender or puss see your doctor. ...Read more

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I have a small little blister looking thing inside of my armpit, but it doesn't hurt what could it be?

I have a small little blister looking thing inside of my armpit, but it doesn't hurt what could it be?

Need to be seen: Not enough detail here for correct identification. If it sticks out like a finger, it is an acrochordon (benign skin tag). If it is a lump deep in the skin it is an epidermal syst or tricholemmal cyst. If you shave there it may contain an in-growing hair.Sometimes they have an opening through which you can squeeze out sebum which looks like cream cheeze with a sour odor. ...Read more

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Does Oral Herpes blisters show up in the armpits?

Does Oral Herpes blisters show up in the armpits?

It's possible: HSV can occur anywhere on the skin and in the oral cavity. While it's possible for HSV to cause a blister in the armpit(axilla) it is less common. Tissue from scrapings of the lesion can be tested for HSV by immunofluorescense staining or PCR DNA testing. ...Read more

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My daughter is 11 and has lil blisters under her armpit that have popped open and now look like cigarette burns can you tell me what it is?

My daughter is 11 and has lil blisters under her armpit that have popped open and now look like cigarette burns can you tell me what it is?

See Your Doctor: Your 11 yr. old daughter has blisters in her armpit. Blistering rashes have numerous causes. Having them confined to her armpit is an unusual location and could be caused by local exposure to an irritant, infections, or even poison ivy through touching the area. Because rashes are difficult to diagnose without visual inspection, your daughter should see her doctor for correct diagnosis. ...Read more

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I woke up this morning with s painful rash above my fight armpit. It really hurts. It looks like blisters?

I woke up this morning with s painful rash above my fight armpit. It really hurts. It looks like blisters?

Rash: Above armpit with pain makes one think of shingles. But I can't be sure without an examination. Since there is a treatment to shorten the course of this disease you need to get in right away to be evaluated. Best wishes. ...Read more

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Does shingles always have a rash? I have a nerve-like pain just below my armpit but no rash or blisters. The pain has been longer than 1 week too.

Does shingles always have a rash?  I have a nerve-like pain just below my armpit but no rash or blisters.  The pain has been longer than 1 week too.

Zoster sine herpete: And that young lady is how we docs say "shingles without a rash." Yes, it DOES exist. And many people are grateful for it since the alternative is have the shingles with all the cosmetic issues. When absolutely necessary we can do spinal taps to identify particles of the virus who are causing the pain and burning symptoms but without a lot of exertion. ...Read more

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Have a sore by my armpit and I'm not sure what it is. Hurts all around it scab in the middle looks like a peeled blister on the outside and is growing?

Have a sore by my armpit and I'm not sure what it is. Hurts all around it scab in the middle looks like a peeled blister on the outside and is growing?

Abscess or infection: Sounds like an infection that needs treatment. Lymph node is a possibility. Problems like this should be seen and evaluated. ...Read more

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Hi, I'm a 32 year old male experiencing sharp pain at the back of my armpit, I do have a reddish patch but no blisters, it burns itches, muscle is sor?

Hard to know: Contact or irritant reaction to hygiene product like antiperspirant seems possible. Could be fungal skin infection or in deeper hair follicle infection or intertrigo. Hard to know without more information or examining the lesion. ...Read more

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Last month i had blisters around genital area and one on my armpit this month got same but also blisters on both armpits. Herpes? If yes, which type?

Difficult to tell: Isolated, painful small blisters around the genitalia suggests hsv i or ii but the, axillary blisters throws a little wrench into the works. May be something else entirely and should be examined by your doctor. ...Read more

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I have a blood blister like spot between my breasts that pop up every few months now its a scar. Now I have one under my armpit. Its blue and red?

I have a blood blister like spot between my breasts that pop up every few months now its a scar. Now I have one under my armpit. Its blue and red?

Angiomas: These lesions sound like cherry angiomas, which can vary somewhat in color and is size They are often inherited. If they enlarge or bleed without trauma I recommend examination by a dermatologist to obtain an accurate diagnosis. ...Read more

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Have rash in armpit and down side that looks like sores. Had white pus filled blister in armpit today that popped and is now sore. What could this be?

Infection : This is an infectious problem. There a specific infections we see in the axilla, it can also be another condition called hidradenitis supprativa. You will need to see a dermatologist and get the diagnoses clarified. ...Read more

Dr. Philip Miller
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Blistering (Definition)

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