Yes, swelling is common...our roo had swollen eyes/face too, and our vet said that it is a symptom of Sinus infection. It sounds like he is on the mend, so maybe antibiotics won't be necessary. Good luck.
Fromm looking at his swollen eyes, I guess that he may have a sinus infection. One of our roos had an eye that swelled and the vet said sinus infection/respiratory infection and prescribed antibiotics. I think Tylan is supposed to be a good antibiotic that you can get w/o prescription. Good luck...