Roller Mouse

If your normal computer mouse is making your hands hurt you can get the Roller Mouse. Instead of always using your hand to move it you slide your arm over it to make the arrow move. You can buy one here:

http://www.amazon.com/dp/B000AQSBC8?tag=craziestgcom-20&camp=213381&creative=390973&linkCode=as4&creativeASIN=B000AQSBC8&adid=07G5ZCBNSJZ3C1D97KXP&