The following lists some possible causes of upper back discomfort amongst computer users.  Potential corrective actions to consider are also listed.

• Frequent or prolonged reaching
  • Move frequently used items within easy reach — avoid frequent overhead or behind body reaches that require twisting
• Static posture and inadequate back support
  • Ensure that the chair is adjusted properly; move around; change postures; stretch
• Lack of support for arms or armrests too high/too low
  • Consider getting a wrist rest, armrests on chair; adjust height of armrests
• Workstation at wrong height — too high or too low
  • Ensure keyboard/mouse or work surface is at appropriate working height