Hello,
It would be important to make an appointment with your doctor for an accurate diagnosis.
Did tou injure your hand while you were are at worK, or did your hand suddenly swell and become painful?
Does your hand tingle or become numb?
http://www.mayoclinic.com/health/carpal-tunnel-syndrome/DS00326/DSECTION=2
Does your whole hand hurt or only your thumb?
http://www.clevelandclinic.org/health/health-info/docs/3100/3122.asp?index=10915
You could possibly have arthritis.
http://www.mayoclinic.com/health/arthritis/AR99999
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