Oh man, my head is pounding and the right side of my face feels all tight. I felt bad yesterday too, couldn't figure out why. Then I realized this morning that it is from the MSG containing food I ate. I hardly ever eat that stuff any more but now I remember why I stopped years ago as a teen. Uggh I feel like crap, I can't believe they still use this stuff in food.
http://health.msn.com/health-topics/.../headaches/msg