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Doctor insights on: Causes Of Pimple Like Rash On Knees

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Dr. John Chiu
2,663 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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I have sudden pimple like rash which appeared on the lower back of my leg, began itchy and as healing is dark red dots slowly fading? Picture added

I have sudden pimple like rash which appeared on the lower back of my leg, began itchy and as healing is dark red dots slowly fading? Picture added

Exposure to plant.?: Have you been hiking... short pants..., insect bite? Are pimples more like pus? Spring time is very common to encounter plant which can cause rash (poison oak & other). If itchy Take antihistamine, topical steroid cream for 7-14 days. If increased pain, spreading redness. See MD to check for infection (cellulitis. ...Read more

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Skin rash lower leg itching and like pimples in small area and also up calf. But spread out - more on one leg than other?

Skin rash lower leg itching and like pimples in small area and also up calf. But spread out - more on one leg than other?

Skin Rash Leg/itchin: It is very difficult to say exactly what it can be for sure without looking at the rash. But from description it seems you have some kind of contact dermatitis of allergic type as it is only limited to one leg.
You should see your doctor to have it diagnosed and treated properly as it may be fungus or some other infection causing the rash. ...Read more

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I am experiencing skin sores, itchy rash (severity: severe) (quality: severe itching) (side: scalp), rash in armpit (quality: pustules or pimples), itch, leg numbness and skin rash (quality: itchiness, blisters, crusty, bumpy, red or bluish purple, fla

I am experiencing skin sores, itchy rash (severity: severe) (quality: severe itching) (side: scalp), rash in armpit (quality: pustules or pimples), itch, leg numbness and skin rash (quality: itchiness, blisters, crusty, bumpy, red or bluish purple, fla

Sore/ itchy rash: May be eczema, psoriasis which could respond to steroids but may need stronger treatment if diffuse, folliculitis for which mupirocin topical and bactrim oral if not allergic would help, or autoimmune process. Or food intolerence- gluten, milk. Would follow up with dermatologist ...Read more

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Caleb keeps getting a bump on his knee, like a pimple, eventually it pops but is very painful. What could this be? What is the best way to treat?

Caleb keeps getting a bump on his knee, like a pimple, eventually it pops but is very painful. What could this be? What is the best way to treat?

Maybe a boil: Some people go through phases where they get recurrent staphylococcal infections. It may be helpful to see the doctor when it is ready to pop to get a culture. There is a prescription bactroban (mupirocin) that can be very helpful for such infections but you need to be seen to get it. ...Read more

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Grandson has pimple-like outbreak behind one knee. Hard encapsulated. They are painful at times. What could this be?

Grandson has pimple-like outbreak behind one knee. Hard encapsulated. They are painful at times. What could this be?

Possibly boils: Hard, painful pimples suggest a localized skin infection usually caused by the bacteria staph aureus. A possible reason it is behind the knee is that your grandson may have eczema which is often behind the knee and makes one more susceptible to staph infections. ...Read more

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My knee hurts and it has a pimple and it is kind of puffed up a little, why?

My knee hurts and it has a pimple and it is kind of puffed up a little, why?

Could be a sign of: Deep infection. See your doctor for an evaluation. Dangerous signs are fever, increased redness at the site and increased pain. ...Read more

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Why do get a pimple on my knee?

Why do get a pimple on my knee?

Pimple: Generally speaking, a pimple on the knee is caused by an infected hair follicle. ...Read more

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I have a big pimple on my knees. It was painfull at the beginning but now it is not. It is big and white in the centre and has red around it. Help me?

I have a big pimple on my knees. It was painfull at the beginning but now it is not. It is big and white in the centre and has red around it. Help me?

See a doctor: This infection needs to be professionally evaluated. It could become quite dangerous if ot properly managed, and may require a small incision to drain pus, an antibiotic prescription, or both. ...Read more

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What can I do for pimples on the knees?

What can I do for pimples on the knees?

Keep clean: If it is from shaving, this is folliculitis.
It is treated with good washing and using a clean razor once it has healed. You can wash the skin with rubbing alcohol several times a day to help clean it up. Some people are more prone to this. If it is not going away or worsening, see your family doc or a dermatologist to get an antibiotic to help clear the skin. Get seen to get best treatment. ...Read more

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Why black pimple head is coming in elbow and knees?

Why black pimple head is coming in elbow and knees?

Ingrown hair?: It may a condition called ingrown hair. Ingrown hairs are hairs that have curled around and grown back into your skin instead of rising up from it. Sometimes dead skin can clog up a hair follicle. That forces the hair inside it to grow sideways under the skin, rather than upward and outward. It may look dark because of hair inside. ...Read more

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Red Pimple on back of knee with a small hole in middle of it. Can this be a bite or boil. How can I tell?

Red Pimple on back of knee with a small hole in middle of it. Can this be a bite or boil. How can I tell?

? boil: Hi Joshua 180.
If it is a red swelling with a hole in it, (pus?) its probably a boil so put hot compresses on it for few days to accelerate to bursting. A bite usually is of a less angry nature, tends to be more diffuse and takes longer to manifest the signs of acute inflammation being: rubor, tumor, calor, dolor, functio laesa ~ redness, swelling, heat, pain, loss of function! (Pathol 101) :-) thank ...Read more

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MY 6 month old has a pimple on his knee. Its big and hard. I popped it 2x white and clear puss came out. Not sure what to do.

MY 6 month old has a pimple on his knee. Its big and hard. I popped it 2x white and clear puss came out. Not sure what to do.

Skin infections: Pus filled bumps on the skin are usually the symptom of a skin infection. When they become red, warm to touch and painful it is called cellulitis. Treatment of this includes oral antibiotics and occassionally drainage. See your doctor, because resistant infections are becoming more common and require special treatment. ...Read more

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I have a 'pimple' on my knee but it's mostly white and looks like there's fluid under it. I shave and thought it was an ingrown hair?

I have a 'pimple' on my knee but it's mostly white and looks like there's fluid under it. I shave and thought it was an ingrown hair?

Cyst: This may represent an Epidermoid cyst. Follow with your PCP or dermatologist and they can remove it if it bothers you! ...Read more

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I woke up with my left knee swollen it hurts n is uncomfortable to move the surrounding areas are fine I see a little bump like a dark pimple what?

Abscess: You may have skin infection going on. The pimple has spread inflammation around and that's what causes pain and swelling. See doc to get it treated. Don't tamper with it yourself. ...Read more

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My 5 yo son has 3 white pimple-looking spots on his knee. Are these contagious and/or need treated?

My 5 yo son has 3 white pimple-looking spots on his knee. Are these contagious and/or need treated?

Hard to know: Really need to see them but could be molluscum, bites, infection of hair follicles, or a number of other things. If they have been there a while and haven't changed much i'd think more likely molluscum. ...Read more

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Tiny itchy pimples same color as flesh in elbows and knees, they come in groups. They itch when forming then they don't. Unvisible unless you searched?

Tiny itchy pimples same color as flesh in elbows and knees, they come in groups. They itch when forming then they don't. Unvisible unless you searched?

Hives: Hives tend to be red, round, raised and very itchy. Yours aren't red but they match up otherwise. I like to think of hives as the baskin robbins of skin conditions, they come in 31 different flavors. Try a little over the counter non-sedating oral antihistamine or topical anti-itch creams twice daily. ...Read more

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I have pimple like bumps on my leg below my knee they do not have a head-on them though they arnt itchy only sore to touch please help thanks?

I have pimple like bumps on my leg below my knee they do not have a head-on them though they arnt itchy only sore to touch please help thanks?

Pimple: Unfortunately we cannot dispense any advice to anyone below 16 and since you didn't mention your age, I must assume you are a young minor. Please see your parents and your doctor for your concern. ...Read more

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Large bump on right knee that has grown with small pimples around it.?

Large bump on right knee that has grown with small pimples around it.?

Bump: Can not diagnose it without seeing it. See your dermatologist if I were to guess from your description I would think about molluscum contageosum. ...Read more

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My daughter got a scrape on her knee almost a week ago. It has still not closed up or scabbed over and today I found 2 small pimples by it. Concerned.

My daughter got a scrape on her knee almost a week ago. It has still not closed up or scabbed over and today I found 2 small pimples by it. Concerned.

Possible infection: Definities clean wound site with gentle soap and warm water and then cover with a thin layer of naaeosporin or generic triple antibiotic ointment (assuming she is not allergic to Neosporin) Cover with a sterile, large canvas bandage and change dress ings AM/PM- if not improving within 48 hours- get checked by a physician. ...Read more

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How to get rid of discoloration around neck and on elbows&knees without effecting my skin. (21yr old female) also I have acne spots left after pimples?

How to get rid of discoloration around neck and on elbows&knees without effecting my skin. (21yr old female) also I have acne spots left after pimples?

Hyperpigmentation: You need to see a dermatologist who can make a recommendation for the treatment. The post acne pigmentation can be treated with peels, topical bleaching agents, topical antioxidants and more importantly, treatment for the acne. The other issue may respond to a moisturizer called LacHydrin (lactic acid) or AmLactin. Additionally it may be a sign of hormone issues, especially if you are overweight. ...Read more

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My 14 month baby has tiny pimples all over her thigh. What causes rashes like that?

My 14 month baby has tiny pimples all over her thigh. What causes rashes like that?

Lots of causes...: ...Including allergy to diapers or baby wipes or moisturizing cream, or direct irritation by harsh soap. Could also be a virus, which is sometimes accompanied by a fever, but not always. There are other, more exotic causes; your quickest solution is to see your pediatrician or a dermatologist and get a precise diagnosis and treatment. ...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


Dr. J. Lawrence Dohan
2,492 Doctors shared insights

Pimples (Definition)

A pimple is a small inflamed spot on the skin. Also known as zit, ...Read more