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Doctor insights on: Bruising Behind Knees Causes

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What causes burst veins and bruising behind your knees?

What causes burst veins and bruising behind your knees?

Age Pressure Reflux: Varicose veins of the lower extremities can have various sources. The varicose veins are a result of pooling of blood with increased venous blood pressure. The best way to close the varicose veins can be determined on physical exam and a focus venous ultrasound examination by a physician skill in treating venous disease. Check out the american venous forum or american college of phlebology. Read more

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Dr. Melissa Gowans
1,435 Doctors shared insights

Ecchymoses (Definition)

Ecchymosis = subcutaneous bleeding covering a diameter ...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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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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Bruise behind my knee, what is this?

Bruise behind my knee, what is this?

A bruise: If it causes pain and does not improve, then have a doctor take a look. Read more

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Bruise behind right knee and no injury to it. I don't know how I got it? It's brownish bruise

Bruise behind right knee and no injury to it. I don't know how I got it? It's brownish bruise

Watch and wait: You may watch and wait for it to heal. If it gets bigger, bleeds, or becomes painful, please see a doctor. 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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What could have caused me to have a bruise and rash on the back of my knee?

What could have caused me to have a bruise and rash on the back of my knee?

See a dermatologist: It is difficult to make a proper diagnosis since I am not there to see the condition. I recommend seeing a dermatologist so that they can make a proper diagnosis and give you something to get rid of the condition or relieve symptoms. Read more

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Does the popliteus tendon cause bruising in back of knee? Can you tear that tendon? Symptoms??

Does the popliteus tendon cause bruising in back of knee? Can you tear that tendon? Symptoms??

Potentially: It is theoretically possible, but also rare to have an isolated tear if popliteus tendon. Much more likely to pull distal hamstring or other posterior structures. Don't hesitate to be seen and possibly get an MRI if you are having trouble with it. Read more

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What can cause a knee cap to swell and bruise and also to have sonething hard that moves on my knee cap please help?

What can cause a knee cap to swell and bruise and also to have sonething hard that moves on my knee cap please help?

Needs eval: Bruise is usually from bleeding, which can also have swelling.
Unusual place to bruise without some trauma?
Knee cap is a bone and hard and moves?
Can be fractured with enough trauma.
Ortho is the discipline most likely to diagnose. Read more

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I got a knee to the thigh which caused bruising. A couple of days later I felt some discomfort on the side of my knee. Is this cause of the bruising.

I got a knee to the thigh which caused bruising. A couple of days later I felt some discomfort on the side of my knee. Is this cause of the bruising.

Bruising:knee pain: The knee to your thigh caused a contusion (bruise) but although this is the first damage one sees, other damage can be done to your knee ligaments, which heal very slowly and would be noticed a "couple days later". Blood from the bruise in your thigh can migrate down to your knee (gravity), and the swelling can also cause mild pain. Read more

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How do I know if I have cellulitis on my knee? And does it cause bruising of the leg?

How do I know if I have cellulitis on my knee? And does it cause bruising of the leg?

Spreading red warmth: This is typically associated with an enlarging area of redness, swelling and warmth. Occasionally one may see involvement of the lymph vessels with red streaks going up to the groin and called lymphangitis.
As seen in the picture, some may circle the borders of the redness to monitor the spread into the surrounding normal tissues. Read more

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I have a rash next to my knee in a square shape that's been there for months. It's even has a little bruise behind it. Any ideas what it is?

I have a rash next to my knee in a square shape that's been there for months. It's even has a little bruise behind it. Any ideas what it is?

Square Dermatitis: This is not a biologic shape. Consider contact dermatitis - something that has been applied to or pressed against the skin. If this does not answer your question, see your dermatologist. Read more

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I have been at the beach for 4 days. Been doing a lot of walking. Noticed slight bruising behind both knees. Should I be concerned. No pain?

I have been at the beach for 4 days. Been doing a lot of walking. Noticed slight bruising behind both knees. Should I be concerned. No pain?

Bruising.: Your question is greatly appreciated. It is often difficult to provide a comprehensive answer without more details. Some of the more worrisome symptoms would include easy bruising, easy bleeding, skin rash, fever, fatigue, weakness or numbness in the extremities among others. If the condition persists or causes you concern it is best to be evaluated by a doctor. Read more

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My son has a bruising behind one knee and in the crease of his forarm. Irregular in shape? We have eczema in my family.

Bruises: If you know that these bruises are caused by trauma like vigorous rubbing, then there should be no concern. If there has been no known injury and bruises (ecchymoses) appear elsewhere, a blood or clotting abnormality may be present and a physician should be consulted. 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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What underlying causes would give me unexplained bruising on my hips, thighs, knees and ankles, that take 3 or more weeks to heal?

What underlying causes would give me unexplained bruising on my hips, thighs, knees and ankles, that take 3 or more weeks to heal?

Bruises: Bruising in multiple areas in the absence of trauma warrant some blood tests to determine if you have a clotting disorder or other abnormality of the blood. Read more

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A greenish bruise on left inner knee. Bruise area have a little lump that worsen when pressed and occasionally when walking. Is it a cause for concern?

A greenish bruise on left inner knee. Bruise area have a little lump that worsen when pressed and occasionally when walking. Is it a cause for concern?

Reassurance: Please, check your physical activity, especially running or any strenuous exercise. If it related you just take it easy. Bruises takes around two weeks for resolution. Read more

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What can cause major bruising above the knee (thigh) & upper leg? It went away on its own (3 weeks) on a friend of mine, could it be a silent signal?

What can cause major bruising above the knee (thigh) & upper leg? It went away on its own (3 weeks) on a friend of mine, could it be a silent signal?

Could be normal: It's hard to say without more information. The important thing would be to determine the history and any associated symptoms. Without any other symptoms or history, it may represent normal bruising which surprisingly can sometimes present with a severe appearance and little trauma (sometimes not even remembered). Read more

Dr. Melissa Gowans
2,087 Doctors shared insights

Bruising (Definition)

Bruising = a contusion with ...Read more