swollen faces/swollen eyes are usually symptoms of an abscess.
Clavamox ( antibiotic) or baytril ( antibiotic) are what are usually used for abcesses personally I like clavamox better for any facial stuff.
Make sure you finish the antibiotic course.
It's fine for her to be back in with her colony as long as no one is targeting her.
If this heals up and it happens again she will need xrays and possibly a tooth pulled.
Antibiotics work well for gliders, providing you complete the course as directed. But that doesn't mean she won't start showing symptoms again if the absess is still present.