[lookdangerous]

I have noticed my right eye twitch after working on the computer too long. I felt like my left brain had been dominant for too long.

[loa_in_]

Be wary, in my personal case it was neck tightness restricting blood flow to the face and jaw. Normally you should be able to make a square by touching fingers to your opposing shoulders and touch wrists to your nose with no pain or tightness, I could not.