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Doctor insights on: Blister On Back Of Leg

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There is a small patch of blisters on the back of my leg where my knee bends. It is also has a huge red rash around it. My leg also hurts to bend.?

There is a small patch of blisters on the back of my leg where my knee bends. It is also has a huge red rash around it. My leg also hurts to bend.?

Get examined: For further evaluation of possible bacterial or viral infection. Cannot be diagnosed without direct visualization. ...Read more

Dr. Philip Miller
1,734 Doctors shared insights

Blistering (Definition)

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


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25 months toddler, small blisters (allergy) on right leg (back of knee area). Concentrated in one area. Not very red, itching.?

25 months toddler, small blisters (allergy) on right leg (back of knee area). Concentrated in one area. Not very red, itching.?

Eczema?: Typically this is the location of an eczema rash at that age, but it also can be a viral infection of the skin. It is best to have the pediatrician look at it and determine what needs to be done. ...Read more

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Ringworm like blister, thigh left leg at the back?

Ringworm like blister, thigh left leg at the back?

Send photo: Please post hd photo of skin lesion to make accurate diagnosis. ...Read more

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I get a reoccuring blister like rash on the back of my leg about once a month. It turns into a sore after a couple days and it hurts! What could it be?

I get a reoccuring blister like rash on the back of my leg about once a month. It turns into a sore after a couple days and it hurts! What could it be?

Recurring Blisters: There is a chance this could be herpes...I would get in when you have the blister and the doc can culture it and also get blood test to see if your body has ever seen the virus. ...Read more

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I have itchy scabs on the back of my thigh and are spreading to my legs. Seem to not be healing and there was recently a blister. Gross. What is it?

I have itchy scabs on the back of my thigh and are spreading to my legs. Seem to not be healing and there was recently a blister. Gross. What is it?

Uncertain: Can’t diagnose with available information. Examination, history & possibly other testing would be needed to make an accurate diagnosis. Treatment would be dictated by diagnosis. ...Read more

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I have got a real bad burn on the back of my leg right under my bottom was burns by hot boiling water in a lot of pain it real red blister leaking?

I have got a real bad burn on the back of my leg right under my bottom was burns by hot boiling water in a lot of pain it real red blister leaking?

Emergency Room: For a burn that bad you should go immediately to a hospital emergency room. Specialized care is need to ensure proper healing. Lack of proper care could result in severe infection. Please do not wait. ...Read more

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Had biopsy done, came back spongiotic dermatitis. Lesions on lower leg&foot, no itch only pain, no blisters. New at age 30, maybe tib plateau surgery cause?

Had biopsy done, came back spongiotic dermatitis. Lesions on lower leg&foot, no itch only pain, no blisters. New at age 30, maybe tib plateau surgery cause?

Why???: What did the Dr say???? Spongiotic dermatitis is a non-specific finding if a biopsy is done on acute eczema. Usually this is treated, not biopsied. Steroid cream is usually effective. ...Read more

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I have red patches on my arms, legs, back, and foot I scratched one on my back and arm now they are blister what could this be this is the second time?

I have red patches on my arms, legs, back, and foot I scratched one on my back and arm now they are blister what could this be this is the second time?

Rash: There could be many different reasons for this rash. It sounds like an allergic reaction if it is itchy vs other causes. You will need a doctor to look at the rash to figure out the cause. ...Read more

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I have tiny itchy blisters that are spreading on my chest, back, legs and arms. Very small clear liquid filled. What could it be, no food allergens?

I have tiny itchy blisters that are spreading on my chest, back, legs and arms. Very small clear liquid filled. What could it be, no food allergens?

Shingles: Sounds like the rash that goes along with shingles. The rash is usually more isolated and in a pattern. I would seek care and evaluation asap as this can benefit from early intervention with medications. ...Read more

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Hi I've recently come up in small spots on my legs, arms, belly and back an they look like tiny blisters an are a bit itchy. What could it be. Thank you?

Hi I've recently come up in small spots on my legs, arms, belly and back an they look like tiny blisters an are a bit itchy. What could it be. Thank you?

Would need to see.: .. to be certain. There are so many causes of itchy rashes. Given that this has spread all over your body, and looks like little blisters, AND is itchy, you really should contact your doctor, to be evaluated. If this IS actually chicken pox, adult infections can be more severe than childhood chicken pox. So, the sooner it is evaluated, the better. ...Read more

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Have some very big knot like blister/red rashes behind both ears, on chest, back and a few on legs. They hurt to touch. What could this be?

Have some very big knot like blister/red rashes behind both ears, on chest, back and a few on legs. They hurt to touch. What could this be?

Need eval: With skin lesions it is always best to see and feel them and occasionally biopsy then. With what you are describing, recommend you see a doctor for evaluation. Sorry this was not more helpful. Best of luck. ...Read more

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Hi! I have -extremely- itchy bumps on my legs. Not quite blisters, just circles of red. On the back of my thigh above the knee armpit. What is this? Ty

Hi! I have -extremely- itchy bumps on my legs. Not quite blisters, just circles of red. On the back of my thigh above the knee armpit. What is this? Ty

Rash: Difficult to say without seeing them but the fact they are so itchy makes me think of hives or bites. Send a picture if you can. Keep them clean and use an antihistamine. All the best. ...Read more

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I am noticing small itchy blisters randomly all over the body. They are at the back and legs and on hand and between fingers. Very small in size but are watery. What they could be? What could be done to cure it, haven't seen any doctor yet. Advice please

I am noticing small itchy blisters randomly all over the body. They are at the back and legs and on hand and between fingers. Very small in size but are watery. What they could be? What could be done to cure it, haven't seen any doctor yet. Advice please

Hard to know: A physician will need to examine and know more about your history. The description does seem consistent with dyshidrotic eczema, but biopsy may be warranted to rule out more serious alternatives. Cold compresses may help while awaiting evaluation. ...Read more

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(l) leg above back of ankle had pimple/ blister, itchy. Used cortisone cream. Today oozing liquid. Cleaned, & used nystatin. Very red/sore. (day 2) dx?

(l) leg above back of ankle had pimple/ blister, itchy. Used cortisone cream. Today oozing liquid. Cleaned, & used nystatin. Very red/sore. (day 2) dx?

Insect bite?: Hard to know what this is without seeing it. If the area of redness and warmth and tenderness continues to increase would recommend seeing a doctor asap. ...Read more

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Weeping blisters on legs, trunk, arms, neck itchy bumps, dry patch skin on back. Weak fatigued, weight loss 10#=3 wks. Blood tests normal?

Weeping blisters on legs, trunk, arms, neck itchy bumps, dry patch skin on back. Weak fatigued, weight loss 10#=3 wks. Blood tests normal?

Get checked soon: Considering your overall fatigue it would be important for you to see a doctor urgently to see if the rashes are related to this fatigue and weight loss. You may be dehydrated and have a blood infection or serious allergic reaction. Good luck ...Read more