Just started a few days ago. Shows up and goes away but im still a bit worried. Already been to the vet and they just gave me some ointment and said ti would clear up.
It looks like cherry eye to me. the ointment is a steroid and should reduce any inflammation and help it go back in. Just keep an eye on it. It may come out every once in awhile, or it may eventually just come out and stay out.
It's not a serious condition, but it can require surgery (they just tuck it back in) if they gland stays out.
Before we switched to a grain free food this would happen to Holly alot. Every bullys different but a benadryl always helped Holly with this. Good luck