"Pleeaase Stop!"

That's what I just told my eye. Yeah, my eye. It's been twitching all day and just got worse during my post-workout shower. So bad that I spent half the time with my eyes closed trying to get it to stop and then I had what felt like an on-coming headache- yuck. So what causes this anyway? It's gotta be something simple like a deficiency in calcium, magnesium, or zinc??? Dang-it! There it went again...