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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes A Sudden Painful Lump On The Knee?

Hello,This afternoon, a hard painful lump about the size of a quarter appeared above my right knee cap, then turned to bruising. It is not raised and hard anymore, but still bruised and tender. I may have bumped into something right before, but don't remember because if I did, it wasn't hard and this appeared suddenly. Any idea if it is something that should be checked out? Thanks!
posted on Fri, 4 Aug 2017
Twitter Tue, 15 Aug 2017 Answered on
Twitter Wed, 16 Aug 2017 Last reviewed on
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  User's Response
Hi there,

A painful lump on above the knee is most likely a hematoma (bruising and blood collection under the skin). I would apply heat and take ibuprofen (no more than 800 mg every 8 hours) to help relieve the symptoms. If it doesn't resolve, an ultrasound can help to identify the mass. It is a quick and non-invasive test. I'd give it about a week and if it hasn't gotten better, you can see your primary care doctor or an urgent care doctor who can order an ultrasound for you. I hope this is helpful. Please feel free to contact me if you have any further questions.
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What Causes A Sudden Painful Lump On The Knee?

Hi there, A painful lump on above the knee is most likely a hematoma (bruising and blood collection under the skin). I would apply heat and take ibuprofen (no more than 800 mg every 8 hours) to help relieve the symptoms. If it doesn t resolve, an ultrasound can help to identify the mass. It is a quick and non-invasive test. I d give it about a week and if it hasn t gotten better, you can see your primary care doctor or an urgent care doctor who can order an ultrasound for you. I hope this is helpful. Please feel free to contact me if you have any further questions.