I think I know why! This happens to me as well, I think it's because when you yawn you leave your eyes open longer than you would normally before you blink. So close your eyes when you yawn and problem solved
10 months ago
Last edited at 6:05PM on 2/19/2013
At the corner of our eye is a tube leading to the nose, at the top of which is a small container called a lachrymal sac. This sac is full of tears. When we yawn the muscles in our face squeeze this sac and tears spill out from the eyes. It's so annoying!