Impingement: This appears to be a very positional symptom where full flexion of your arms results in impingement of nerves entering your hands and extension of arms relieves the impingement. Another possibility is a carpal tunnel syndrome, but I would expect hand tingling or numbness on other occasions as well. A hand surgeon or neurologist can evaluate and advise you if you still have concerns.
Answered 8/12/2019
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A doctor has provided 1 answer
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