My wrists bothered me when I had tight/spasmed muscles in my upper body.
Even my forearms were in some spasms and all that tension was causing a pulling on my wrist joints, reducing the tension above the wrist stopped the pain. I also had triggerpoints & referred pain/symptoms that played a part in it all too.

http://www.pressurepointer.com/Scale...ger_points.htm
the full pressure pointer chart- clicking on the different muscle names brings up more info so you can find which might apply for you -
http://www.pressurepointer.com/pain_reference_chart.htm