Glossary
Cherry eye
A red, swollen lump at the inner corner of the eye caused when the gland of the third eyelid pops out of place.
Also called: prolapsed third eyelid gland, nictitans gland prolapse, red lump in corner of eye
Dogs have a third eyelid in the inner corner of each eye, and a tear-making gland sits at its base. In cherry eye the tissue that anchors the gland gives way and the gland slips out as a round, pink to red swelling that looks like a cherry. It often begins in dogs under two years old.
It is seen most in breeds with a flat face or droopy eyes, including the Bulldog, Cocker Spaniel, Beagle and Boston Terrier. It is not usually an emergency, but the exposed gland can get dry, irritated or inflamed.
A veterinarian should examine it, because the gland produces a large share of the eye's tears. Vets now usually try to reposition the gland rather than remove it, since removal can contribute to dry eye later.
Last reviewed November 8, 2026