What Am I Experiencing Intermittent, Sudden, Sharp, Debilitating Pain In My Hands?

I ve been experiencing intermittent, sudden, sharp, debilitating pain in my both hands (one or the other, not simultaneously) that lasts from just a few seconds to up to 15 minutes, during which I m not able to use my affected hand. This has been happening for about the last 3 or so months. The pain in both hands is located along the outer side, centered between my wrist bone and the knuckle of my little finger. It comes on regardless of whether I m using my hand or doing nothing at all. The pain feels like a broken bone, but then stops just as suddenly as it started. This happens anywhere from once every 2 weeks to once a day, with no discernible cause. I am constantly at a computer keyboard and use my hands quite a bit for all sorts of activities, but this doesn t seem to be joint-related. Any ideas as to what the cause could possibly be?