Get nauseated, headachy after playing game, anyone else?

[Renegade_]

This can be caused by many things:
• do you have general motion sickness?
• view bobbing can aggravate this (I don't think it can be turned off)
• are you playing in a high contrast environment? (try playing in a well-lit area)
• are you playing with no crosshairs? (enable crosshair so your eyes have a "resting place")
• if you are using a CRT, ensure your refresh rate is at least 85Hz.