Why the rabbit's eyes are swollen?

At the beginning, some little rabbits seem to have scratches around their eyes, and then they slowly develop to other places, like scarring, and there are a lot of pus under the scar. I don't know how to get a foot swelling. I don't know what's going on. Please help me analyze ~ attachment: you need to log in before you can download or view the attachment. No account number? Register