Another common cause of pain is mouse clicking. If you need to perform a significant amount of mouse clicking, you may want to consider using an alternate input device, like a foot pedal, so that you can click using your foot. The amount of force needed to click the mouse can produce wear and tear just as keyboard key pressure can. It is important to find a mouse with a comfortable button click and to find ways to use large muscle groups to assist in your mousing.
Consider alternate input devices in order to increase productivity and minimize impact to smaller body parts.
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Use dwell click and never click a mouse again. Just google dwell click and try it out!