Hard to say: There are many potential causes. From neurologic, to vascular, and muscular causes. I would encourage you to be checked. Usually a detailed history, exam, and appropriate studies can determine the cause. Thank you for your question.
Answered 3/7/2013
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4 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
4 doctors weighed in across 2 answers
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