Varies: Causes may vary. Did you injure it? At your age, an arthritic cause would be unlikely. The most common thing we will see in that area is a tear of the medial meniscus. Don't hesitate to be seen for a specific diagnosis.
Answered 10/10/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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