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Doctor insights on: Rash Behind Knees And Armpits

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My 3 year old son has a rash in both armpits and behind both knees. They itch. His armpit ones are spreading. What could this be?

My 3 year old son has a rash in both armpits and behind both knees. They itch. His armpit ones are spreading. What could this be?

Sounds like it: Could be eczema, a contact rash or a fungal infection. For the first 2, the treatment would be a cortisone cream and for the third an anti-fungal cream. If he is otherwise well, you could try these over-the-counter and if not better, or worsening or appears ill in any way, I would recommend seeing his pediatrician. ...Read more

Dr. John Chiu
2,673 Doctors shared insights

Rash (Definition)

A skin rash is a symptom in which a person has changes on part or all of his skin, such as color changes, bumps, blisters, oozing, peeling, ...Read more


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For a few weeks now, I've had itchy areas on my arms and legs. They start out as tiny little spots. Then I started scratching and they become red, itchy rashes. I have 2 places on my left arm, 1 on my right and behind both of my legs (knee area). What

For a few weeks now, I've had itchy areas on my arms and legs. They start out as tiny little spots. Then I started scratching and they become red, itchy rashes. I have 2 places on my left arm, 1 on my right and behind both of my legs (knee area). What

Dry skin?: First try applying a moisturizer all over your body within 3 minutes after bathing and see if this helps. For the rash, topical hydrocortisone for a few days may be helpful. However if this is a persistent or worsening problem, I would recommend a dermatology consult. ...Read more

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My 2 year old has a rash armpit, back of knee, down arm, back of neck with fever?

My 2 year old has a rash armpit, back of knee, down arm, back of neck with fever?

To vague for dx: There are far too many conditions or agents that could be linked to this set of symptoms. You may need to see a doc if the problem doesn't self heal over a day or two. ...Read more

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Hello, I've been feeling more exhausted than usual and I've had a rash on my knees, ankles, armpits and inner thighs for over a month. Any suggestions for clearing it up? I haven't changed my diet, shampoo/body wash or laundry detergent yet, but I'm alre

Hello, I've been feeling more exhausted than usual and I've had a rash on my knees, ankles, armpits and inner thighs for over a month. Any suggestions for clearing it up? I haven't changed my diet, shampoo/body wash or laundry detergent yet, but I'm alre

Exam needed: I strongly recommend that a dermatologist examine you for diagnosis and treatment. We have recently been hearing about a lot of scabies cases. Other possibilities include eczematoid dermatitis, allergic reaction. I think it's quite important that you be examined soon. Appropriate tests will be ordered. ...Read more

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My 8th mnt daughter has skin rashes on head, elbows, knee, bumps, cheeks, neck, arm. Her dad has psoriasis. Cud it be d same n is it serious? Using cetaphil.

My 8th mnt daughter has skin rashes on head, elbows, knee, bumps, cheeks, neck, arm. Her dad has psoriasis. Cud it be d same n is it serious? Using cetaphil.

Itchy?: At this young age, I would be more suspicious of eczema (atopic dermatitis) which may be linked to food allergies as well as airborne allergens. If these rash itch, then eczema is more likely. If you are using Cetaphil lotion, be sure to use it regularly and apply it within 3 mins after bathing. Talk to your pediatrician. A discussion of eczema can be found elsewhere. ...Read more

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What could cause itchy red rash under upper arm and back of knees?

What could cause itchy red rash under upper arm and back of knees?

Many possibilities: Possibilities are intertrigo, eczema, inverse psoriasis, contact dermatitis, candida (yeast). See a doctor or dermatologist for proper diagnosis and treatment. ...Read more

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My son has developed a rash in his belly button the fold of his arm and being his knees. It's not bumps just red and itchy any suggestions he's three?

My son has developed a rash in his belly button the fold of his arm and being his knees. It's not bumps just red and itchy any suggestions he's three?

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

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My 15 weeks old is 1 of those chubby babies. The folds behind her knees & in her armpits are so red & irritated. What medication will help heal it?  

My 15 weeks old is 1 of those chubby babies. The folds behind her knees & in her armpits are so red & irritated. What medication will help heal it?  

Candida: The antecubital and popliteal fossae in young chubby babies are areas where they can get a candidal yeast infection due to humidity and wetness. You can use nystatin topically three times a day for 4 weeks. Also important to keep the area dry, consider using vaseline to keep the area from getting wet. ...Read more

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Is there a difference between inflamed lymph nodes & general glands? I have puffy glands in my upper thighs, armpit, behind knees but no sign of nodes

Is there a difference between inflamed lymph nodes & general glands? I have puffy glands in my upper thighs, armpit, behind knees but no sign of nodes

Lymphadenopathy: Your question is difficult to interpret. Don't know what you are distinguishing between "glands" and "nodes". These need to be seen and examined by a doctor in order to be correctly diagnosed. Good luck. ...Read more

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I'm getting rashes behind my knees, my arms near elbows, my stomach above belly button. What could this be?

I'm getting rashes behind my knees, my arms near elbows, my stomach above belly button. What could this be?

Eczema: But it could also be dry skin especially during the winter months. Need to lotion up with any moisturizing cream or lotion, you may also need prescription strength steroids depending on the severity. ...Read more

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My 4 yr old son suffers from itching, rashes and redness after every 7-10 days behind his knees & back of his thighs, hips and elbow joints?

My 4 yr old son suffers from itching, rashes and redness after every 7-10 days behind his knees & back of his thighs, hips and elbow joints?

Eczema: Eczema is a skin problem which causes dry, itchy skin, especially in the areas you mentioned. It can come and go for years. Bathe with plain water, only mild soap as needed, no scrubbing. Pat dry and apply a good moisturizer (no fragrance, thick, not a watery lotion) regularly. If it worsens and causes raw skin, see your doctor. ...Read more

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Three year old red rash behind knees and inside elbows, what could this be?

Three year old red rash behind knees and inside elbows, what could this be?

Eczema: This can be many things, but the most common is eczema. It is commonly associated with allergies and is treated with moisturizing and emollient creams and ointments. When more severe, steroid medications are sometimes used. ...Read more

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My daughter has a small pimply looking rash behind her knee. It has made a couple of clusters and is traveling to the front of her leg.?

My daughter has a small pimply looking rash behind her knee. It has made a couple of clusters and is traveling to the front of her leg.?

? Shingles: I'd think about shingles as a possibility. Please have it seen by a doctor. The sooner shingles is treated, the better the outcome. ...Read more

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Rash on back of thigh and behind knees. Sat too long?

Rash on back of thigh and behind knees. Sat too long?

Rash from sitting: Possibly. There are many causes of skin rashes in these areas, but sweating and friction is a common cause on the back of the upper legs. ...Read more

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Behind my knee I have seemed to have got a slight rash with black dots on. It doesn't itch but I don't know what to do to get rid of it.?

Behind my knee I have seemed to have got a slight rash with black dots on. It doesn't itch but I don't know what to do to get rid of it.?

Rash: Examining the rash is the only way to know for sure what it is. I only worry about rashes that are spreading, itch and show bruising. I would suggest watching the rash over a few days to see if it changes. If better don't worry if worse see you doctor. ...Read more

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My son (11) and daughter (7) have got a reaction on their skin, it’s is mostly on the neck, behind knees, under arm areas. Allergy to pool chem possib?

My son (11) and daughter (7) have got a reaction on their skin, it’s is mostly on the neck, behind knees, under arm areas. Allergy to pool chem possib?

Very much possible: A reaction to a chemical can cause such, kindly, avoid swimming in that pool for now, have a shower, apply hydrocortisone cream OTC to affected areas, if no improvement, see your doctor, best wishes ...Read more

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I have a itchy rash looks blike dry skin it started on my chest and behind my knees. Ir?

I have a itchy rash looks blike dry skin it started on my chest and behind my knees. Ir?

See a dermatologist: It is difficult to make a proper diagnosis since I am not there to see the condition. I recommend seeing a dermatologist so that they can make a proper diagnosis and give you something to get rid of the condition or relieve symptoms. ...Read more

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I have a rash next to my knee in a square shape that's been there for months. It's even has a little bruise behind it. Any ideas what it is?

I have a rash next to my knee in a square shape that's been there for months. It's even has a little bruise behind it. Any ideas what it is?

Square Dermatitis: This is not a biologic shape. Consider contact dermatitis - something that has been applied to or pressed against the skin. If this does not answer your question, see your dermatologist. ...Read more

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I have these little water bumps coming up on my knee, calf, on the middle of my but and behind my arm on my tricep?

I have these little water bumps coming up on my knee, calf, on the middle of my but and behind my arm on my tricep?

See below: Problems like these can only be correctly handled by your doctor in person. He/she needs to listen to you, perform an examination and possibly run labs or other tests. That's the only way he/she can find out what's going on and what to do about it. ...Read more

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I have a deep bruise behind my left knee dors not go away and does not hurt, now im noticing the same above my elbows with a rash.

I have a deep bruise behind my left knee dors not go away and does not hurt, now im noticing the same above my elbows with a rash.

Bruising: If this bruising is happening spontaneously without any injury or trauma please see your doctor as soon as you can to be examined. This could be a sign of a more serious issue. ...Read more

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Skin behind knee feels like I have a small burn. But the skin is normal with no rash or redness or swelling. I don't have pain just a rash feeling.?

Skin behind knee feels like I have a small burn. But the skin is normal with no rash or redness or swelling. I don't have pain just a rash feeling.?

Nerve endings: It appears that you have irritable nerve endings in the superficial nerves behind the knee. As long as there are no other symptoms of redness, tenderness, swelling or distended veins, there appears to be no serious problem. ...Read more

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Red rash behind knee; blood vessel?

Red rash behind knee; blood vessel?

Doubtful.: A rash probably is not a blood vessel unless you have a group of spider veins in that area which would give the appearance of spider legs. Varicose veins would be raised, blue and grape-like in appearance. A red rash doesn't sound like veins. You should see a vein specialist for an evaluation. ...Read more

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I got a sweat rash behind my knee a year ago. It disappeared a long time ago but it's coming back again since the weather's getting warmer. Normal?

I got a sweat rash behind my knee a year ago. It disappeared a long time ago but it's coming back again since the weather's getting warmer. Normal?

Eczema behind knees: Most of the time eczema gets worse when it is cold outside due to dryness of air both inside and outside. However in some people eczema flares in the spring and summer when humidity goes up. In this case keeping the area cool and using a fragrance-free moisturizing cream may help relieve the symptoms and improve rash. If not, please see your dermatologist. ...Read more

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What can cause swollen Inguinal Lymph Nodes (also neck, arm pit and behind knee on occasion) consistently for almost 2 years? (All on left side only)

Lymphadenopathy: When lymph nodes enlarge it is often due to their performing their designated function in helping to fight off an inflammatory process. If these remain enlarged, are fixed to underlying tissues or stony hard in consistency they should be seen by a doctor. Or if you are overly concerned, do that for reassurance. Best wishes. ...Read more

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New laundry detergant gave me a skin rash on my legs and behind my knees. There is also some swelling behind my knees.?

New laundry detergant gave me a skin rash on my legs and behind my knees. There is also some swelling behind my knees.?

Hydrocortisone: First of all, all rashes are skin rashes; there is no other place to get a rash. Try otc Hydrocortisone cream for a few days. If the rash persists or worsens, a dermatologist should take a look to confirm the diagnosis and prescribe something stronger. ...Read more

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New laundry detergent caused me to get a skin rash on my legs and behind my knees. Now it seems behind my knees is a little swollen. What can I do?

New laundry detergent caused me to get a skin rash on my legs and behind my knees. Now it seems behind my knees is a little swollen. What can I do?

Stop: Stop using the new detergent and switch to one without harsh chemicals or fragrances. Something like ivory or similar store brands...See your family doc for a check of the symptoms to make sure that is what it actually is.... ...Read more

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After swimming if I don't have a shower straight afterwards I get itchy where my eczema usually occurs (crease of my arm, behind the knees) what is it?

After swimming if I don't have a shower straight afterwards I get itchy where my eczema usually occurs (crease of my arm, behind the knees) what is it?

Skin Irritation: Chlorinated pools can be very drying to the skin and can cause acute worsening of eczema. With eczema it is always important to shower or bathe right after swimming in a chlorinated pool or using a hot tub. Use a gentle cleanser to remove chemicals, then apply moisturizer right afterward. ...Read more

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How long should bruising last after having a blood test taken and why have I developed bruising all around my elbow on the same arm and behind the knee of the same side of the body?

How long should bruising last after having a blood test taken and why have I developed bruising all around my elbow on the same arm and behind the knee of the same side of the body?

See primary M.D.: Bruising at puncture sight from needle is very common and clears out in about a week. However having bleeding around elbow and knee is bothersome, You should go and see your primary doctor. After checking you out, he may need to do some more blood tests to rule out any bleeding disorder. ...Read more

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Rash on both of my legs behind my knees and up to approx mid thigh?? from exercise have had loratadine but now keeping me awake and very itchy

Rash on both of my legs behind my knees and up to approx mid thigh?? from exercise have had loratadine but now keeping me awake and very itchy

Duration?: Have you had this problem for years or just recently. Are your elbow crease areas also affected (think eczema)? Are these areas in contact with new gym clothing with spandex (think contact allergy)? You may try topical cortisone cream but will likely need to see a dermatologist to find out the cause. ...Read more

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Hi im simply askin for help for some problem ive been having behind my knee, it very itchy, red rash like bumps that hurt to and sting, pleasw help!

Hi im simply askin for help for some problem ive been having behind my knee, it very itchy, red rash like bumps that hurt to and sting, pleasw help!

Wrong forum: You have an acute medical problem that requires the help of your doctor. In person. Health tap is here for education. We clearly state that this is not health care. We do not offer treatment. Please go see your doctor. ...Read more

Dr. Cornelia Franz
1,059 Doctors shared insights

Rash (Definition)

A rash is a change to skin condition which can affect color, appearance, or texture. It may or may not ...Read more