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Doctor insights on: Causes Of Small Red Itchy Bumps On Knees

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I have a bright red (and itchy!) rash on the back of both my legs, between my butt and knee. It looks like small bug bite like bumps. Not spreading.?

I have a bright red (and itchy!) rash on the back of both my legs, between my butt and knee. It looks like small bug bite like bumps. Not spreading.?

Many causes: Rashes are challenging even when the doctor can see them, so even harder in this forum. Small red bumps on both legs make me think of reactions to clothes, or something in contact with that area on both sides. Bites can do it. It could be heat rash, a reaction of the skin to warmth and occlusion from pressure. Some drug reactions can do that as can conditions like eczema and psoriasis. ...Read more

Dr. Doanh Nguyen, md, faaaai
647 Doctors shared insights

Itchy Rash (Definition)

Most itchy rashes are called eczema or dermatitis. Both are due to ...Read more


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I have red itchy bumps on my arms and neck recently changed bed covers what are they from? Also have a cluster of small bumps on knee they're very red

I have red itchy bumps on my arms and neck recently changed bed covers what are they from? Also have a cluster of small bumps on knee they're very red

Hard to say: But one would suspect something from the new bedspread might be the cause- although it may have nothing to do with it at all. If you have put away the new bedspread and continue to have the skin rash more than a week after, consider seeing a dermatologist. In the meanwhile, try topical hydrocortisone cream. ...Read more

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Many bright red and itchy rash on the back of both my legs, between butt and knee. It looks like small bug bite like bumps smeared in a line. Nospread?

Many bright red and itchy rash on the back of both my legs, between butt and knee. It looks like small bug bite like bumps smeared in a line. Nospread?

Many causes: Rashes are challenging even when the doctor can see them, so even harder in this forum. Small red bumps on both legs make me think of reactions to clothes, or something in contact with that area on both sides. Bites can do it. It could be heat rash, a reaction of the skin to warmth and occlusion from pressure. Some drug reactions can do that as can conditions like eczema and psoriasis. ...Read more

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What are these red itchy bumps on the back of my knees, elbows and wrists?

What are these red itchy bumps on the back of my knees, elbows and wrists?

Skin Bumps: It is difficult to provide recommendations without an image of your skin lesions. Can you upload a picture? ...Read more

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Red and itchy bumps on the back part of my knee and then the area began to swell and the bumps started spreading. I had a steroid shot and pill. Help?

Red and itchy bumps on the back part of my knee and then the area began to swell and the bumps started spreading. I had a steroid shot and pill. Help?

Red: Given you are describing a red rash that is spreading, I would be concerned for an infection. Sounds like you were treated for a contact dermatitis, but this should respond. I suggest you get checked. ...Read more

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I have seen my Doctor several times over the last 2 years about this red, itchy rash with tiny fluid filled bumps on my knees.

I have seen my Doctor several times over the last 2 years about this red, itchy rash with tiny fluid filled bumps on my knees.

Itchy rash: Rashes are notoriously difficult to solve without seeing them. Hives are like raised patches and can be described as water-filled. Several treatment modalities would help you in that case. Contact allergy may be more likely and an Allergist can help identify triggers and treat that as well. Step 1 is to try not to rub/itch it, which makes the itch worse in either case. ...Read more

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I have tiny red itchy bumps on my elbows and upper arm. They come and go. And sometimes appear on knees, thighs and bottom. What can be causing this?!

I have tiny red itchy bumps on my elbows and upper arm. They come and go. And sometimes appear on knees, thighs and bottom. What can be causing this?!

See a dermatologist: Can be one of several possibilities, you need to be evaluated and physically examined, you can start by your doctor who may refer you to a dermatologist, best wishes ...Read more

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Sudden appearance of red itchy rash behind my knee, swelling and spreading. I scratched my eyelid and got four bumps there too so its spreading?

Sudden appearance of red itchy rash behind my knee, swelling and spreading. I scratched my eyelid and got four bumps there too so its spreading?

Allergies: Patients with allergies can develop red and itchy skin around the eyes and on the eyelids from allergies. Behind the knees and on the inside part of the elbow too. This skin condition is called allergic dermatitis or allergic eczema. You can use a hypoallergenic cream/lotion: cetaphil or lubriderm and consider contacting your medical doctor about taking allergy pills-such as Claritin (loratadine) or allegra. ...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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10 small, dark red, very itchy bumps on my leg. They seem to be spreading. Advice/ Suggestions/ Diagnosis please!

10 small, dark red, very itchy bumps on my leg. They seem to be spreading. Advice/ Suggestions/ Diagnosis please!

Hard to say: Can't really tell what these are without an exam or photo. Could be insect bites, scabies, allergic reaction, or a skin infection. Suggest you see a doctor to get them checked. Good luck! ...Read more

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Small red bump on top of vein on arm and leg? The diameter of a vein. Also some huge white itchy bumps from mosquito bites. I'm on vacation in zagreb.

Small red bump on top of vein on arm and leg? The diameter of a vein. Also some huge white itchy bumps from mosquito bites. I'm on vacation in zagreb.

Wish could: See a picture but can't. Could it be a bug bite too? If it's new maybe that's it. If not better get it seen when back deem vacation. If you can get some1% hydrocortisone creame try it but doubt you will find it there. Enjoy your vacation ...Read more

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I have these Hard red, itchy bumps on my leg and also a part of it looks like a scar, please tell me what it is???

I have these Hard red, itchy bumps on my leg and also a part of it looks like a scar, please tell me what it is???

Bumps: It's difficult to provide an accurate diagnosis on lesions not seen. A Dermatologist may be able to evaluate this rash and provide a more accurate answer, a skin biopsy also may prove to be useful in some more difficult cases that are not immediatley apparent on a clinical diagnosis. ...Read more

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Itchy bumps appear often (mostly arm/leg/back), can be goosebump-like or can get as large as bug bites. Disappears in a few hours. Usually not red.

Itchy bumps appear often (mostly arm/leg/back), can be goosebump-like or can get as large as bug bites. Disappears in a few hours. Usually not red.

Hives / urticaria: Usually, itchy bumps are urticaria, or hives. They go away in a few hours and the skin looks normal. They are white in the bump area and usually it is pink around the outside. The bumps are called wheals and the areas around them are called flares. If you don't have ANY redness anywhere, it may be eczema or something else. Antihistamines like zyrtec, Allegra or Benadryl (diphenhydramine) help the itch. See a doc! ...Read more

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I have these hard red itchy bumps on my ankle and one on my lower right leg next to my ankle. What are they and how do I get rid of them?

I have these hard red itchy bumps on my ankle and one on my lower right leg next to my ankle. What are they and how do I get rid of them?

Itchy rash: The location of the rash may indicate insect bites, but hard to tell without looking at it, you may need to see a doctor for that. ...Read more

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There are little red itchy bumps on my arms and left leg that look like insect bites but appear out of no where and burn under warm water. Any ideas?

There are little red itchy bumps on my arms and left leg that look like insect bites but appear out of no where and burn under warm water. Any ideas?

Possible: Some people can get a "heat rash" that worsens when the skin is hot and usually gets better when cooled. However, to really be certain you should have this problem examined. ...Read more

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Itchy bumps on elbows and knees. Why?

Itchy bumps on elbows and knees. Why?

Allerfy? Psoriaisis?: This could represent dermatitis or psoriasis. This could be assocated with food allergy or atopic dermatitis. Try hydrocrotisone over the counter. If not effective see dermatologist for evaluation amd treatment. ...Read more

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I have itchy bumps on elbows and knees. What could it be?

I have itchy bumps on elbows and knees. What could it be?

Rash: Any skin condition is difficult to identify without seeing it or having more history. What does it look like? Is it red? Flad/raised? Etc. It could be that your knees have come into contact with something and is showing an allergic reaction. Could be eczema or psoriasis or skin rashes can sometimes be a sign of something going on internally. Best to have a doctor take a look and take a full history. ...Read more

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I have itchy bumps from my knees to my ankles all of a sudden?

I have itchy bumps from my knees to my ankles all of a sudden?

Consider an allergy: Or allergic reaction to something you ate, were exposed to, or if you started taking a new medication. See your doctor to check this out and find out, if an allergic reaction, what it is you're allergic to. ...Read more

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I have tiny itchy bumps little bit reddish in elbow and knees, how can I treat this?

I have tiny itchy bumps little bit reddish in elbow and knees, how can I treat this?

Many possibilities: There are many things that could cause a rash. 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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I have a patch of itchy bumps that have developed on both knees. Is that eczema?

Eczema is: The itch that rashes, would certainly be possible especially if you have allergies or asthma. location would be more in back knees - creases ...Read more

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I have itchy bumps on the side of my elbow, side of my knees, side of my armpits, on my waist and my lower spine.?

I have itchy bumps on the side of my elbow, side of my knees, side of my armpits, on my waist and my lower spine.?

Need pic: I think a picture wil be helpful in diagnosing your problem. It could be anything from eczema to molluscum, to scabies. ...Read more