Q. My dog has some pink erotation aronund her eyes and also some swelling that happened suddenly under her chin
DAVID ELBEZE, DVM, MRCVS
A. sounds like an acute allergic reaction, it could be something she ate or something she came in contact with outside (insect bite, plant) or inside (cleaning solution). Those reaction are often mild and self limiting, monitor the swelling, her breathing and her general state, if she seems to be getting worst take her to the vet to get an injection and stop the allergic reaction.