Is it normal to tear up when you yawn?
Yep.Totally normal
Yes—tearing up when you yawn is normal. The muscles and pressure changes involved in a big yawn can squeeze the tear glands and make your eyes water.
Yep, your eyes can water when you yawn because the movement squeezes the tear glands and affects the tiny drainage channels around your eyes. It’s a normal reflex, not a sign that you’re suddenly emotional or that something’s wrong.
It happens to plenty of people, though some eyes are more dramatic about it than others. You might notice it more with a really big yawn, dry eyes, or contact lenses.