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Doctor insights on: Why Do The Back Of Your Knees Itch

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Why do the back of your knees itch?

Why do the back of your knees itch?

Hydrocortisone: Maybe just a rash from irritation — try Hydrocortisone 1%. If does not help may need to see your doc as it could be fungal infection. In general the back of the knee tends to be moist and allergic rash as well as fungal infection are common. ...Read more

Dr. Jack Mutnick
1,079 doctors shared insights

Itch (Definition)

An itch is an irritating sensation that causes one to have the urge ...Read more


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My joints in my wrists, knees, feet, a bit in my neck/back, and are sorswollen. My skin itches. I have a lump behind my ear. Blood wk ok. What is it?

My joints in my wrists, knees, feet, a bit in my neck/back, and are sorswollen. My skin itches. I have a lump behind my ear. Blood wk ok. What is it?

Aches: Could be a lot of things. The itch and lump may not be related which confuses matters. Would be useful to know what labs you've had that were normal. Viral illnesses can do weird things to adults, include make your joints swell and your skin itch. I'd be concerned if you were having fevers or losing weight unexpectedly. ...Read more

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I have a bug bite behind my knee. It constantly itches and is swelling. The pain has gotten so severe that I cannot extend my leg. What do I do?

I have a bug bite behind my knee. It constantly itches and is swelling. The pain has gotten so severe that I cannot extend my leg. What do I do?

Infected?: If it is red and hot it may be infected. If you think that is possible then see a doctor as soon as you can. Infections can become more serious if left untreated. If it is not red and hot try some cool compresses and hydrocortisone cream to try do decrease the itching until it resolves. ...Read more

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My knee itches really bad. I think I have scoriosis. What can in I put on it.

My knee itches really bad. I think I have scoriosis. What can in I put on it.

Possibly: 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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What is this on the inside of both elbows and knees? It itches and is sometimes a little painfull as well. How can we treat it?

What is this on the inside of both elbows and knees? It itches and is sometimes a little painfull as well. How can we treat it?

Need to see MD: A persistent rash or lesion of some kind should be viewed directly by a health care provider to sort out what it is. ...Read more

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I have a patch on knee that itches and dark. Any idea?

I have a patch on knee that itches and dark. Any idea?

Skin lesion: Unfortunately, without looking at it, it is impossible to arrive to a diagnosis. I recommend you see a local medical provider. ...Read more

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Had a knee scope two years ago now if I kneel it feels like my knee is ripping open and it itches really bad but I can't feel it when I itch it?

Had a knee scope two years ago now if I kneel it feels like my knee is ripping open and it itches really bad but I can't feel it when I itch it?

Knee: What was the scope for & what did they do? Was it just to see what was going on? Do you have a history of trauma to that knee? Consult with us to help guide you better to see if you need to see your orthopedist again. ...Read more

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My thigh itches above the knee on the outer side. Also, goes numb and tingles now and then....sensitive to touch at time?

My thigh itches above the knee on the outer side. Also, goes numb and tingles now and then....sensitive to touch at time?

Tingling: Many things could cause the sensation you are describing, one the common causes that comes to mind is "meralgia parasthetica". This refers to compression of the one of the nerves that supplies sensation to your outer thigh. Treatment is usually supportive. ...Read more

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I had a tic in my knee over a month ago the spot still itches and you can still see 33 where it was at?

I had a tic in my knee over a month ago the spot still itches and you can still see 33 where it was at?

Not unusual, but...: The local reaction to a tick bite is not that different from what you would have from a splinter. The tick was a foreign body & your body is reacting to it. When removed, sometimes mouth parts break off & stay in the skin, which can cause a more prolonged reaction. Fortunately, these leftovers do not greatly add to your risk of tick borne diseases. If you have rash, fever, pain however, see a dr. ...Read more

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Tick bite still itches after months and now having some pain and swelling in knee. Have been tested for Lyme and it was negative? Now what?

Tick bite still itches after months and now having some pain and swelling in knee. Have been tested for Lyme and it was negative? Now what?

What does the DR say: There are numerous reasons why you may have trouble with your knee. Have you seen a rheumatologist or orthopedic specialist? Itching is not a sign of Lyme disease. What does your DR say? ...Read more

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I have a light purple/pink spot on the skin of my knee cap It sometimes itches scratching makes white crust to come off it and it sometimes weeps too

Sounds like LSC: Lichen simplex chronicus is the thickening of your skin after chronic itching and scratching. If you scratch hard enough you can cause weeping and even secondary infection. Try aquaphor and AM lactam to reduce itching and help healing. Sometimes you may need prescription strength cordran tape to help from derm. ...Read more

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I have a bruise on my inner thigh abt six inches above the knee. It started small but is grwing w/sevrl bruises. It itches & idk how I got it. Worry?

I have a bruise on my inner thigh abt six inches above the knee. It started small but is grwing w/sevrl bruises. It itches & idk how I got it. Worry?

Not sure but the: Only way to find out is monitor it to make sure it doesn't evolve normally and go away. Bruises tend to enlarge briefly for 1-2 days, then change color from red/black to green/yellow, then start to fade. If you continue to have bruises throughout your body, then you need to get checked out for certain diseases by a healthcare provider. Thanks for trusting in HealthTap. ...Read more

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I fell out of bed weeks ago and hit my left knee on the hard floor. Now weeks later the area is tender and the lowr leg is swollen tender and itches?

I fell out of bed weeks ago and hit my left knee on the hard floor. Now weeks later the area is tender and the lowr leg is swollen tender and itches?

Blood clot: You need to have the leg examined for a possible deep or superficial vein clot. A ruptured baker's cyst or a knee effusion are other possible causes. It needs an exam and possibly xrays and/or ultrasound to sort this out. ...Read more

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Had stitches last month for 2wks for a laceration on my knee-they removed 2 weeks ago. Scar is very painful, hurts & itches since. Very uncomfortable!

Had stitches last month for 2wks for a laceration on my knee-they removed 2 weeks ago. Scar is very painful, hurts & itches since. Very uncomfortable!

Normal healing : Can cause itching and pain due to inflammatory mediators If pain does not go away in a week or two see your doctor ...Read more

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The bottom of my foot itches like crazy nothing is visible and my foot and knee now hurts like crazy also feels like something is moving on the bottom?

Insufficient info: It would be helpful to know the age, underlying condition and medication, duration of the symptoms. It could be anywhere infection to neuropathy. See your primary care physician first. ...Read more

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I have a red bump a couple of inches away from my knee cap, now it does not hurt but it only itches when touched.and when I scratch its numb.

I have a red bump a couple of inches away from my knee cap, now it does not hurt but it only itches when touched.and when I scratch its numb.

Varies: There are multiple potential causes, among them are inflammatory and even infectious conditions. Don't hesitate to be seen if the area expands or becomes warm or develops a discharge. ...Read more

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My penis itches my knee itches my arm itches forearms its white discoloration dry skin on my penis?

My penis itches my knee itches my arm itches forearms its white discoloration dry skin on my penis?

Need more info...: How long have these itches been? How these bother you? Have you lived in a new house or eaten something new? . All these issues need to be addressed. As to Rx, try moistening the skin with gentle washing with no harsh soaps or... and applying creams for dry skin + lightly touch 1% hydrocortisone caream to the itchy spots and see... Of course, seek evaluation and counseling timely. Best wishes... ...Read more

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I hav a rash on both arms and knees it itches like crazy! Had it for a very long time was told cardboard mites but cnt find them I have tried Benadryl (diphenhydramine) spray cream and pill and nothing helps!

I hav a rash on both arms and knees it itches like crazy! Had it for a very long time was told cardboard mites but cnt find them I have tried Benadryl (diphenhydramine) spray cream and pill and nothing helps!

Hard : Hard to tell without a clinical examination, but perhaps it is psoriasis or eczema? Read more about these conditions (and a classic picture on the arms, legs) and treatment options at the link below. I hope that helps a little! ...Read more

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My feet are itchy and burning after itching....and knees arms hands feet itches in night more...help me.I got red rashes after 2 days of itching.tq?

My feet are itchy and burning after itching....and knees arms hands feet itches in night more...help me.I got red rashes after 2 days of itching.tq?

Clean, don't scratch: Clean the bedding well. Gently clean your body well too and wipe w/ diluted vinegar or witch hazel, etc. Use a hypoallergic lotion too. Take Benadryl (diphenhydramine) as directed. If you still suffer, see a Dr. You might need a lb test and/or a Rx anti-inflammatory. Try hard to not scratch! Avoid infection. ...Read more

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On the back of my knee, there was a pink ring last night and it was itchy so I didn't touch it. This morning it turned purple and stopped itching?

On the back of my knee, there was a pink ring last night and it was itchy so I didn't touch it. This morning it turned purple and stopped itching?

Uncertain: Show your parents. This rash needs to be visualized & a history needs to be obtained in order to make an accurate diagnosis. ...Read more

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Woke up back of knee itching, swelling and painful what could it be? Knee almost feels numb please help?

Woke up back of knee itching, swelling and painful what could it be? Knee almost feels numb please help?

Of course the first : Thing one thinks of is trauma.... did you injure it in some way? Other thoughts would be a Baker's cyst or fluid collection behind the knee or, less likely, a blood clot. The only way to know is to be evaluated, perhaps considering an ultrasound exam. See your Doctor. Good wishes:) ...Read more