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Doctor insights on: Bruise In Behind My Knee

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Bruise Or Contusion (Definition)

Bruises, or ecchymoses, are discolorations and tenderness of the skin or mucous membranes due to the leakage of blood from an injured blood vessel into the surrounding tissues. A serious disease called pupura presents as a cluster of small bruises called petachia. Petachia often appears as many tiny red dots clustered together, and could indicate a problem. ...Read more


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I discovered a very deep and dark purple bruise behind my knee 2 days ago...It is swollen a bit and very sore. I do not remember hitting or banging it?

I discovered a very deep and dark purple bruise behind my knee 2 days ago...It is swollen a bit and very sore. I do not remember hitting or banging it?

Post knee bruise: Not unusual to have spontaneous rupture of a posterior knee cyst,without a history of trauma. expect bruising and discomfort to resolve gradually . Avoid activities and positions that produce increased discomfort. Use ice , alleve for 7- 10 days ...Read more

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I am 45 years old with a nickel size bruise behind my knee...it is painful to touch. Area is tender but not red and slightly swollen. 6 flights recent?

I am 45 years old with a nickel size bruise behind my knee...it is painful to touch. Area is tender but not red and slightly swollen. 6 flights recent?

Please get examined.: The examination should include a careful physical examination, ultrasound, & lab tests. This should be dealt with with all haste. Please let me know the results of your evaluation. ...Read more

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I have had a dry cough for over a month now and metallic taste in my mouth after coughing. & a bruise came up behind my knee overnight. ?

I have had a dry cough for over a month now and metallic taste in my mouth after coughing. & a bruise came up behind my knee overnight. ?

Medical care: I don't know what risk factors you might have for an underlying cause, but,regardless, a cough that lasts a month or more requires evaluation. The metallic taste might be an associated symptom, especially if you have infection in your sinuses or bronchial passages. As to the bruise behind your knee, only further evaluation will reveal what's causing it. ...Read more

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I just noticed weird brownish bruise behind my right knee. I didn't hit it against anything so concerned how I got it?

I just noticed weird brownish bruise behind my right knee. I didn't hit it against anything so concerned how I got it?

Ruptured Vessel: If it doesn't hurt I would just watch it. Could be a broken blood vessel from anything. If it starts to hurt or get bigger get it checked. ...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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I have what looks like bruising/discoloration behind my knee, but it's painless. It's a brown color, not purple/blue. What could be the cause?

I have what looks like bruising/discoloration behind my knee, but it's painless. It's a brown color, not purple/blue. What could be the cause?

Ecchymosis: This pigment could be due to breakdown products of red blood cells which stain the skin brownish yellow. Perhaps a tiny capillary or vein ruptured spontaneously and painlessly in the area. This pigment usually fades away gradually over a few weeks. Your physician can advise you further if necessary. ...Read more

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Hi just yesterday feel like behind my knee was bruised but no bruise there and bot fallen or banged it...I have started running light jogging could it be this....

Hi just yesterday feel like behind my knee was bruised  but no bruise there and bot fallen or banged it...I have started running light jogging could it be this....

Question truncated: Your full question was truncated. Could be a bakers cyst or sprain or other knee problem. Resubmit your question or follow up with your GP to get checked out. ...Read more

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What could cause bruising behind my knee 5 days after straining my mcl?

What could cause bruising behind my knee 5 days after straining my mcl?

Bleeding: When you sprain the mcl, you tear the ligament. This caused bleeding in the location of the tear. You probably elevated the knee, so the blood travelled behind your knee and collected where you see bruising. That is completely normal. It may even become sore in the bruised area because of an inflammatory response. ...Read more

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Lower back pain getting worse. Shoots down back of leg. Just noticed black bruising behind my knee, are these related, and should I be worried?

Lower back pain getting worse.  Shoots down back of leg.  Just noticed black bruising behind my knee, are these related, and should I be worried?

Injury, vascular : The bleeding suggest some type of trauma. Need to discuss this with your position. You could be a muscle tear, it could be a vascular issue, because even be a ruptured Baker's cyst. Your physician will have you evaluated to see what the diagnosis is ...Read more

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I have swelling and varicose veins behind my knee, have recently had pain too. Is the swelling from the veins? It also looks bruised. Is that normal?

I have swelling and varicose veins behind my knee, have recently had pain too. Is the swelling from the veins? It also looks bruised. Is that normal?

Hard to say: It's hard to say with certainty without examining your knee. Could be varicose veins, could be a bakers cyst. It may be a deep vein thrombosis which is a serious condition. You should see a doctor to have this evaluated. ...Read more

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Can the blood clot behind my knee dislodge if i hit my shin against shower rail? Slight bruise sz of quarter with with a slight bump. On xarelto 20 mg

Can the blood clot behind my knee dislodge if i hit my shin against shower rail? Slight bruise sz of quarter with with a slight bump. On xarelto 20 mg

Very unlikely: The injury described would be quite unlikely to cause the clot you have to dislodge. The swelling at the site is due to local bleeding from the injury and being on a blood thinner. Elevate the leg, cool compresses to the injury and watch for increased swelling in your calf and lower leg. ...Read more

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My skin is really transparent and I can see veins. Why is one tender behind my knee?

My skin is really transparent and I can see veins. Why is one tender behind my knee?

Varicose vein: If your veins are distended or tender you may have varicose veins. If so, they may be associated with some tenderness. If there is pain in the lower extremities, you should check with your physician to ensure you do not have any deep vein thromboses (clots in the legs). ...Read more

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Is a bulge behind my knee a symptom of knee injury in the front?

Is a bulge behind my knee a symptom of knee injury in the front?

Yes it could be: Many time people come because of the blug behind the knee or the side of the knee, we take MRI we find meniscus tear or arthitis.Thanks. ...Read more

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Had a pop behind my knee cap now hurts and can't put weight on it?

Had a pop behind my knee cap now hurts and can't put weight on it?

Orthopedic eval: You should see an orthopedist. A pop sound and impaired ability to bear weight are suspicious for a soft tissue injury to the ligaments or tendons in the knee. In the short term, you can ice it, elevate it, compress it with an ace wrap, and take some Motrin or advil (ibuprofen). ...Read more

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What to do if I have a hernia behind my knee, un-operable or operable ?

What to do if I have a hernia behind my knee, un-operable or operable ?

Baker's Cyst: A "hernia" of the knee is pushing of the cushioning sac between the thigh bone (femur) and lower leg bones (tibia and fibula); it is rarely called a "hernia". When upright and the knee is completely straight, a cystic swelling may appear as a bulging mass on the inside of the knee pit below the skin creases. Physical exam by an orthopedist will usually confirm the diagnosis. They can be removed. ...Read more

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I have a thumping like behind my knee and i can see it thumping and feel it is that normal? 14 femal

I have a thumping like behind my knee and i can see it thumping and feel it is that normal? 14 femal

Try : Try and see if the thumping is in time with your pulse, or if it appears to be from a muscle spasm. If you can see palpable pulse, that would be very concerning and you should be seen immediately. If you are having muscle spasms, you could try taking an anti-inflammatory and observe, but if it persists or you have pain or new symptoms then you should have a medical evaluation. ...Read more

Dr. Melissa Gowans
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Bruising (Definition)

Bruising = a contusion with ...Read more