If you have wrist pain..

Shortcut:
1) Learn proper posture

• Adjustable height seat
• Lumber support
• Screen at arms length
• Top of screen no higher than your eyes
• Wrists not at an angle for either keyboard or mouse
• Keyboard and Mouse should be close enough for your forearm to be near horizontal and in-front of you rather than at an angle away from you and your upper arm to be near vertical
  Keyboard and mouse should be roughly next to each other without your forearm drifting off at an angle to strain to use the mouse.
  These days with numeric and function keypads on keyboards it is making keyboards much wider than previously resulting in the mouse being too far away and further arm twisting. If you don’t absolutely need the extra function keys, get a compact keyboard instead.

2) See this Cured wrist pain [video]
3) Download any one: Eyeleo Workrave Bigstretch Pc-work-break Evo //--[a brief description]