I Have Been Having A Very Sharp Pain In My

I have been having a very sharp pain in my wrist whenever I clench my hand, or squeeze it into a fist. It hurts on and off, and during other strenuous tasks while using my hands. The best example I can use, and when it hurts the most, is when I am stapling a few pages of paper together. That motion is what is causing the pain. I don't remember doing anything painful to my wrist however. Do you have any suggestions to what my problem may be?