Several possibles.: If pain and tenderness are involved, it is likely due to arthritic inflammation. Another causes increase fluid retention. There is no way to know for sure unless you have a doctor evaluate it.
Answered 6/10/2013
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7 doctors weighed in across 3 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
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