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Doctor insights on: Behind My Knee Bruising

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Dr. Melissa Gowans
1,415 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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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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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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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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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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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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Why do I have a throbbing pain behind my knee?

Why do I have a throbbing pain behind my knee?

PAIN: Usualy you have pain because there is something wrong and to make you pay attention to the problem. As for a cause many possibilities some of them serious so get it checked asap( like a blood clot). ...Read more

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Why are the lymph nodes behind my knee swollen?

Why are the lymph nodes behind my knee swollen?

See doctor : The is no lymph node on the back of knee. Get it check. ...Read more

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What can cause sharp pain behind my knee when skateboarding?

What can cause sharp pain behind my knee when skateboarding?

Commonly Tendinitis: While there can be many cause of pain in the back of the knee and full evaluation may be necessary to be sure, mostly commonly if you a skateboarding a lot -- you may be experiencing a repetitive use injury and commonly that is a result of tendons becoming inflammed. Hope that helps! ...Read more

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I was in a wreck and tore my ACL. There are real hard lumps behind my knee. Should I be worried?

I was in a wreck and tore my ACL. There are real hard lumps behind my knee. Should I be worried?

No, but be seen: I would not be eorried, but I would be seen. There are certainly patients who tear their ACL and can have other associated injuries as well that may need treatment. ...Read more

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I have brusing and swelling behind my knee and want to know if I should see a dr. I have no idea how I got it. ?

I have brusing and swelling behind my knee and want to know if I should see a dr. I have no idea how I got it. ?

Baker's cyst: You may have had a baker's cyst which is a cyst that occurs behind the knee. If it ruptured you may have bruising and swelling related to this. Baker's cysts usually require no treatment unless they are symptomatic. You should have this evaluated by a doctor. You can consult with a doctor at health tap as well. ...Read more

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Help pls..Should i seek pro. Help if behind my knee hurts wen i bend it, put pressure, and walk? Pain began several days ago.

Help pls..Should i seek pro. Help if behind my knee hurts wen i bend it, put pressure, and walk? Pain began several days ago.

Yes : These symptoms sound very amenable to seeing a professional, getting a prompt diagnosis, and will likely help you feel better much sooner. ...Read more

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I rolled over this morning and had a cramp behind my knee. Then i got out of bed and had a cramp behind the opposite knee. What is going on?

I rolled over this morning and had a cramp behind my knee. Then i got out of bed and had a cramp behind the opposite knee. What is going on?

Lytes/hydration: We all get that sometimes, like the calf then the top of the foot. Be sure your electrolytes are normal by consulting your md for lab and exam for pulses. Allow good blood flow with good hydration and not compressing your blood flow with folded legs and tight clothing. Overexertion and dehydration also causes that, again needing good hydration. ...Read more

Dr. Melissa Gowans
2,060 doctors shared insights

Bruising (Definition)

Bruising = a contusion with ...Read more