Bipolar Disorder Support Group
Bipolar disorder is not just a single disorder, but a category of mood disorders marked by periods of abnormally high energy and euphoria, often accompanied by bouts of clinical depression. This is the place to talk about your experience with bipolar disorder, learn from others' experiences, and find support.
Maybe you are gripping it too hard, are you left handed?
LOL
http://health.yahoo.com/musculoskeletal-overview/finger-hand-and-wrist-problems-noninjury/healthwise--handp.html
I have started to try to sit on my left hand when scrolling around so I don't lean on my elbow so much. It has really helped.