Colin FosterBy Colin Foster

Updated November 2026

Eye boogers in cats are usually harmless. A small amount of crust in the corners of your cat’s eyes is normal, and it is often just dried tears, oil and debris that collect while your cat sleeps. This guide explains why your cat has eye boogers, how to clean them safely, and which signs mean you should call a veterinarian.

What Eye Boogers Usually Are

Cats produce tears to keep their eyes moist and clear of dust. Those tears drain through small ducts into the nose, but some fluid, mucus and oil dry at the inner corners of the eyes. When the discharge is clear or light-colored and only a little crusty, it is typically normal tear film residue.

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Some cats produce more of it than others. Breeds with flat faces, such as Persians and Himalayans, tend to have more tear overflow because their tear ducts are often shorter or less effective at draining.

Common Causes of Extra Eye Discharge

If the buildup is heavier than usual, look at what has changed. The most common causes include:

  • Dust, pollen or litter particles irritating the eye surface
  • Blocked tear ducts, which cause tears to spill onto the face
  • Upper respiratory infection, often with sneezing and nasal discharge
  • Conjunctivitis, an inflammation of the eye lining that can cause redness and swelling
  • Corneal scratches or ulcers, which often cause squinting and watery eyes
  • Allergies, which may cause itching and rubbing of the face

Discharge that is yellow, green or thick is more concerning and often points to infection.

How to Clean Your Cat’s Eyes Safely

Gentle daily cleaning prevents crust from building up. Follow these steps:

  1. Wash your hands and gather a clean, soft cloth or cotton ball and warm water.
  2. Soak the cloth or cotton ball in warm water and wring it out well.
  3. Hold the cloth gently against the crust for a few seconds to soften it.
  4. Wipe from the inner corner of the eye outward, using a fresh section of cloth for each eye.
  5. Never use human eye drops, cotton swabs or any product not prescribed by your vet.

Stop if your cat pulls away sharply or the eye looks painful. Forcing cleaning can injure the cornea.

When Eye Discharge Needs a Vet Visit

Contact a veterinarian promptly if you notice any of the following:

Sign What It May Mean
Yellow or green discharge Possible bacterial infection
Squinting or keeping the eye closed Possible scratch, ulcer or pain
Redness, swelling or a cloudy eye Possible conjunctivitis or corneal problem
Discharge from one eye only that persists Possible blocked duct, foreign object or injury
Sneezing, nasal discharge or lethargy Possible upper respiratory infection

A vet can check for a corneal injury with a simple stain test and recommend treatment. This is general information, so consult a veterinarian for any ongoing or severe eye issue.

Common Mistakes

  • Using human eye drops or ointments without veterinary advice.
  • Ignoring one-sided discharge that lasts more than a day or two.
  • Scrubbing hard, which can irritate the delicate skin around the eye.
  • Assuming yellow discharge will clear up on its own.
  • Skipping cleaning in long-haired cats, where crust can stick to the fur and irritate the eye.

Soft cotton pads are gentle on the skin and leave no lint near the eye. View on Amazon

A saline eye rinse made for pets, used only as your vet directs, can help flush debris from the surface. View on Amazon

A pet-safe wipe designed for facial cleaning can be handy for quick touch-ups between full cleanings. View on Amazon

FAQ

Is it normal for my cat to have eye boogers every morning?

Yes, a small amount of dried discharge in the morning is common and usually harmless. Wipe it away gently, and watch for changes in color, amount or how your cat behaves.

Can eye boogers mean my cat has a cold?

They can. Cat colds often cause watery or crusty eyes along with sneezing and nasal discharge. If these signs appear together, schedule a vet visit.

Should I trim the fur around my cat’s eyes?

Trimming long hair near the eyes can reduce irritation and crust buildup. Use blunt-tipped scissors carefully, or ask a groomer or vet to do it.

Conclusion

Most eye boogers in cats are normal tear residue that a warm, damp cloth can clear away. Pay attention to color, amount and whether one eye is affected. If discharge is yellow or green, or your cat is squinting, rubbing or seems uncomfortable, see a veterinarian soon.

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Colin Foster

About Colin Foster

Colin Foster is part of our editorial team and reviews and edits our cats guides, checking product details against manufacturer specifications and owner feedback.