Eye / nose discharge

Does your cat have ongoing discharge from the eyes or nose?

Your cat has ongoing discharge from the eyes or nose — it could be clear tears/nasal fluid, or thick, discolored, pus-like discharge. A small amount of discharge in the corner of the eye now and then is normal for a healthy cat, but persistent discharge, increasing amounts, or a change in color are worth watching.

Possible medical causes

Upper respiratory infection (feline "cold"): over 90% are caused by feline herpesvirus or calicivirus, though chlamydia or mycoplasma infection are also possible; often combined with sneezing, coughing, red/swollen conjunctiva, mouth ulcers, and reduced energy/appetite
Chronic nasal discharge: viral infection (especially herpesvirus) can damage the nasal lining, leading to secondary bacterial infection and recurring chronic discharge
Conjunctivitis: can be caused by environmental irritants (dust, chemical sprays, cigarette smoke), trauma, or a foreign object in the eye

Possible behavioral causes

Warning signs — see a vet right away

Discharge changes from clear to thick yellow-green, or contains blood
Combined with obvious conjunctival redness/swelling, light sensitivity, squinting, or constant pawing at the eye
Combined with reduced energy/appetite, fever, or mouth ulcers
Symptoms that persist without improving in kittens, cats with chronic illness, or cats with weaker immunity

Initial at-home suggestions

Gently wipe away discharge with a cotton pad dampened with warm water, to prevent crusting that sticks the eyelid shut
Watch for changes in the discharge's color and thickness, and note whether it's one eye or both
Check your home for irritants: air fresheners, cigarette smoke, dust
In multi-cat households, note that upper respiratory infections are highly contagious — isolate the affected cat appropriately

Sources: Cornell Feline Health Center、iCatCare. For reference only — please consult a vet.