Yes I still do at times.. but it was really bad in 03-05. I did 10 hr day assembly work and a large part of it was with arms out and holding parts and such..
I didn't get face pain but more burning in upper back muscles and achy burning neck and shoulders. I did get a terribly annoying watery eye and more from trigger points.

Some of it is from the tired fatigued muscles having to hold /balance weight of the head.. our head can weight up to 14 lbs!! and the more you lean forward the more the body has to hold that weight..

For face pain have you read about referred pain from trigger points?
we have a sticky thread with trigger point info..