It is located on my left hand which is the hand that I write with. It doesn't move around. It feels like it is on top of my bones located on the thumb and index finger at the bottom right side near my wrist but not on my wrist. The pain is mild and it hurts more when I am in the middle of doing something with it. the bump is very noticeable when the hand is relaxed from the wrist. it is only on the left hand.