Varies: Did you injure it in any way? There are a variety of causes from post-traumatic, to inflammatory, to degenerative causes (although unlikely in 22 yo). A detailed exam and appropriate studies would likely determine the cause. I would not hesitate to be seen for an accurate diagnosis.
Answered 4/17/2017
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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
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