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Learn about your blister, including causes and common questions. Or get a personalized analysis of your blister from our A.I. health assistant. At Buoy, we build tools that help you know what’s wrong right now and how to get the right care.

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Your Blister May Also be Known as:
Large fluid filled bump
Rash with fluid

Top 5 Blister Causes

  1. 1.Shingles (Herpes Zoster)

    Shingles (herpes zoster) is a disease caused by the varicella-zoster virus - the same virus that causes chickenpox. Early signs of shingles include burning or shooting pain and tingling or itching, usually on one side of the body or face. Rashes or blisters appear anywhere from one to 14 days later. If shingles appears on the face, it may affect vision or hearing.

    You should go to a retail clinic or your primary care physician to be treated for shingles. Most common treatments involve pain killers and prescription antiviral medicines.

    Rarity:
    Common
    Top Symptoms:
    fatigue, dizziness, diarrhea, headache, weight loss
    Symptoms that always occur with shingles (herpes zoster):
    grouped rash, rash
    Urgency:
    Primary care doctor
  2. 2.Skin Infection (Cellulitis)

    Cellulitis is a common and possibly dangerous skin infection if left untreated. It is typically caused by bacteria living on the skin getting into the skin itself.

    You should visit your primary care physician within the next 24 hours to examine the infection and possibly provide antibiotics.

    Rarity:
    Uncommon
    Top Symptoms:
    moderate fever, painful rash, feeling confused and not making sense while talking, red rash, abnormally high heartrate
    Symptoms that always occur with skin infection (cellulitis):
    red rash, painful rash
    Urgency:
    Primary care doctor

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  3. 3.Necrotizing Fasciitis of the Groin

    Necrotizing fasciitis is a potentially life threatening skin condition stemming from the infection of a wound or injury. If left untreated, it can spread to body parts surrounding the infection changing the color of the skin and degrading the tissue underneath. This can result in muscle, tissue or limb loss and a severe body-wide response to the infection.

    You should visit your local emergency room where blood tests can be run and a consultation can be made by a skin specialist. If caught early, antibiotics, cleaning, and a stay in the hospital can help control the infection. If serious, additionally procedures may be required. It is important to get treatment due to the possibility of this becoming a serious, life-threatening condition.

    Rarity:
    Rare
    Top Symptoms:
    nausea, vomiting, fever, diarrhea, chills
    Symptoms that always occur with necrotizing fasciitis of the groin:
    skin changes of the groin or genitalia
    Urgency:
    Hospital emergency room
  4. 4.Necrotizing Fasciitis of the Leg

    Necrotizing fasciitis is a potentially life threatening skin condition stemming from the infection of a wound or injury. If left untreated, it can spread to body parts surrounding the infection changing the color of the skin and degrading the tissue underneath. This can result in muscle, tissue or limb loss and a severe body-wide response to the infection.

    You should visit your local emergency room where blood tests can be run and a consultation can be made by a skin specialist. If caught early, antibiotics, cleaning, and a stay in the hospital can help control the infection. If serious, additionally procedures may be required. It is important to get treatment due to the possibility of this becoming a serious, life-threatening condition.

    Rarity:
    Rare
    Top Symptoms:
    nausea, vomiting, fever, diarrhea, chills
    Symptoms that always occur with necrotizing fasciitis of the leg:
    leg skin changes
    Urgency:
    Hospital emergency room
  5. 5.Necrotizing Fasciitis of the Arm

    Necrotizing fasciitis is a potentially life threatening skin condition stemming from the infection of a wound or injury. If left untreated, it can spread to body parts surrounding the infection changing the color of the skin and degrading the tissue underneath. This can result in muscle, tissue or limb loss and a severe body-wide response to the infection.

    You should visit your local emergency room where blood tests can be run and a consultation can be made by a skin specialist. If caught early, antibiotics, cleaning, and a stay in the hospital can help control the infection. If serious, additionally procedures may be required. It is important to get treatment due to the possibility of this becoming a serious, life-threatening condition.

    Rarity:
    Rare
    Top Symptoms:
    nausea, vomiting, fever, diarrhea, chills
    Symptoms that always occur with necrotizing fasciitis of the arm:
    skin changes on arm
    Urgency:
    Hospital emergency room

FAQs About Blister

Here are some frequently asked questions about blister.

Do blisters go away on their own?

The most common type of blister is an abrasion blister, usually brought about by some sort of strenuous rubbing of skin against an object. They can be caused by running in shoes that don't fit, doing a repetitive task like yard work for the first time without gloves, or even working out without proper hand protection. Blisters that come about in this way usually disappear and become less tender naturally with time. Blisters may also arise because of a rash or exposure. Burns from the sun or direct exposure to fire or steam often blister, rashes from exposure to toxins like poison ivy may blister, and chemical burns may also blister. If you have a rash from an unknown source that is blistering you should seek medical attention.

What do you do if you accidentally pop a blister?

There is not much to do aside from keeping the site of the popped blister clean and protected. You may notice a red and tender area under the skin of the blister. For your own comfort and to prevent infection, it can help to place a dry bandage over the popped blister and to change it 1–2 times per day, keeping it dry before changing it. But, in most cases, it will resolve on its own.

Can diabetes cause blisters on my body?

Yes, diabetes can cause blisters. This is called bullous disease of diabetes. The blisters caused by diabetes are under the skin and do not have a clear cause. They are often red and swollen and most commonly appear on the feet or legs. They commonly and spontaneously resolve over the course of a few weeks.

Can blisters spread to other parts of my body?

Yes, depending on the cause, blisters can spread and often do spread. Blisters caused by a sunburn, for example, will develop first in the area most intensely exposed to the sun. If you have received a sufficiently high dose of UV radiation, you may later develop blisters in other areas as well. Autoimmune disorders of the blood vessels or skin, infectious diseases, and exposure to certain plants and chemicals can all cause blisters to spread from one area of the body to another. Health professionals are trained to look at the distribution of a rash with blisters to determine its cause. If you have a spreading rash with blisters you should see a health professional for diagnosis.

Can blisters get infected?

Yes, blisters can get infected. The chance of infection is higher for larger blisters, but is present for any size of blister. Keys to ensuring that the blister does not get infected, is keeping any substance (e.g. dirt, oil, water, antibacterial gel) from getting caught under the dead skin overlying the blister. This can be done either by carefully removing the skin or by keeping the blister dry and covered during times when it might be exposed to some infectious material.

Questions Your Doctor May Ask About Blister

  • Q.Any fever today or during the last week?
  • Q.Have you been feeling more tired than usual, lethargic or fatigued despite sleeping a normal amount?
  • Q.Is your rash:
  • Q.Have you ever been diagnosed with diabetes?

If you've answered yes to one or more of these questions, check our blister symptom checker.

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Blister Symptom Checker Statistics

  • People who have experienced blister have also experienced:

    • 12% Swelling of the Eye Area
    • 12% Fatigue
    • 6% Fever
  • People who have experienced blister had symptoms persist for:

    • 35% Less Than a Day
    • 25% Over a Month
    • 23% Less Than a Week
  • Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

Blister Checker

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