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Doctor insights on: Pimple Like Rash On Knees

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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

Dr. Cornelia Franz
1,059 doctors shared insights

Rash (Definition)

Most bumps and blotches on a newborn baby are harmless and clear up by themselves. By far the most common skin problem in infants is diaper rash. Diaper rash is an irritation of the skin caused by dampness, urine, or feces. Most babies who wear diapers will have some type of diaper rash. However, there are other skin disorders that can cause rashes. These are usually not serious unless ...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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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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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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Dr. John Chiu
2,559 doctors shared insights

Skin 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


Dr. J. Lawrence Dohan
2,402 doctors shared insights

Pimples (Definition)

Pimples are a kind of acne, and are a condition where oil gets trapped in a pore of the skin resulting in small area of ...Read more