Maybe: If there is no injury it could be a muscle, ligament, tendon injury or bakers cyst. Blood clots are possible and would not need to be red swollen or painful. Best advice is get examined please.
Answered 10/31/2014
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2 doctors weighed in across 2 answers
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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