Many reasons: There could be many reasons for bruising behind the knee. Injury such as a contusion to the area, a ruptured popliteal cyst may manifest itself in the back of the knee.
Answered 7/7/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
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