Why do we tear up when we yawn?

I am a girl and I don't really cry. I tear up but not cry. Even if something is really sad, or when I am really sad I don't c...

I keep yawning at school, it's not that I find school that boring but I just yawn even when other people aren't making me yaw...

I have a ?. My girlfriend always yawns a lot during her monthly cycle and then stops when it is over. Can you give me some cl...

Whenever something good or bad happens in my relationship I burst into tears. Sometimes I dont even feel like crying; they ju...

Lol my dad wants to know why we yawn when were sleepy if anyone knows thankx for the answer

I don't know how to say this really. I don't exactly cry at random, but my eyes just start tearing. Tears will just run dow...

This is probably nothing big, but I'm just wondering - why do I still yawn and stuff the next day when I'm not really tired a...

I was reading online a lot and im homescool I stay my the my laptop a lot but why dose my right eye tears? am I going blind o...

Lately, my eyes have been watering so much! When I laugh, sneeze, or sometimes when i'm just hanging out and watching tv, tea...

I think I might know the answer to this question but will untreated vaginal tears lead to toxic shock syndrome? I might have...