Cat Eye Discharge: Causes & Care
Veterinary references checked with PetHealth+ · Last reviewed June 2026
By Kaiser Khan , Founder Veterinary references checked with PetHealth+ ( process ) Last reviewed Cite this page How we research & review
Watery eyes in flat-faced breeds differ from thick yellow discharge of infection. Squinting or cloudiness needs urgent care — corneal ulcers are painful.
Infectious causes
Cat flu (herpesvirus, calicivirus) causes conjunctivitis and discharge.
Blocked tear ducts
Persistent wetness without redness — common in Persians.
Care
Clean with cooled boiled water; separate cloth per eye.
Related: Persian cat eye care · Cat sneezing
Frequently asked questions
Is eye discharge contagious?
Viral cat flu can spread between cats — isolate new cases.
Can allergies cause runny eyes?
Yes — environmental allergens irritate eyes.
When is eye discharge urgent?
Squinting, bulging eye, or green thick pus — same day.
Do kittens get eye infections?
Yes — neonatal conjunctivitis is common without early vet care.