Swollen Face?

by Emily
(Canada)

Today, my cockatiel hit into a window. I thought he was dead, but he just knocked himself out. I put him back in his cage, so he could rest, when he woke up. I came back, 5 hours later, and his eyes are swollen shut, and there's a white-ish line above his beak, that also appears to be swollen.
I'm not sure what to do.
Help please!