My guinea pigs eyes seem to be to bulge out!?

my guinea pig has brown eyes and when he eat or just sits down, his eyes bulge out and i can see the white cog! Is this natural, or is it fruitless?

Answers: Stop holding your guinea pig so tightly then.

its a brain tumor ! omg seriously it will die im not even kid mine did that same thing and it be a brain tumor get it to the vet similar to now !

aw-w-w-w!
(might be a thyroid condition!)

I reflect he has Graves Disease. Stand Back! He's gonna blow!

I used to know how to see the whites of my guinea pigs eyes. It's dead very soon, i dont know if it was related to that though.

If you hold him by the tail, they will spatter out.

Stop worrying !