Dog Eye Discharge
Seeing gunk, tears, or mucus in your dog’s eye can be worrying. Some discharge is mild, but eye problems can get serious quickly, so it helps to know what’s normal, what’s urgent, and when to call your vet.
When to Call a Vet for Dog Eye Discharge
Go to the ER now
- ● Your dog is squinting hard, seems to be in significant eye pain, or won’t let you touch the face.
- ● The eye looks cloudy, blue, bulging, or suddenly changes in appearance.
- ● There was trauma to the eye or face, or you suspect a scratch, puncture, chemical exposure, or foreign material in the eye.
- ● Your dog seems to be losing vision, bumping into things, or the eye problem came on very suddenly.
- ● Eye discharge is paired with severe redness, marked swelling, or bleeding from the eye.
See a vet within 24 hours
- ● The discharge is thick, yellow, green, or mucus-like rather than just a small amount of clear tearing.
- ● One or both eyes are red, swollen, or your dog keeps pawing or rubbing at them.
- ● The problem lasts more than a day, keeps coming back, or is getting worse.
- ● Your dog also has sneezing, nasal discharge, coughing, or seems generally unwell.
- ● Your dog has a known eye condition like dry eye, glaucoma, eyelid problems, or a history of eye ulcers.
Watch at home, call if it worsens
- ● There is a small amount of clear tearing or sleep crust in the corner of the eye, but the eye itself looks white and comfortable.
- ● Your dog is acting normally, with no squinting, redness, swelling, or pawing at the eye.
- ● The discharge improves after you gently wipe it away with a clean, damp cloth.
- ● The discharge happened briefly after wind, dust, grooming, or a mild environmental irritant and does not continue.
- ● Both eyes remain bright and open, with no change in vision or behavior.
Common Causes of Dog Eye Discharge
Conjunctivitis
Inflammation of the tissues around the eye can cause redness, swelling, and discharge. It may be triggered by infection, irritants, allergies, dry eye, or an underlying eyelid problem.
Dry eye (KCS)
Dogs with dry eye often develop thick, sticky, yellow-green discharge because they are not making enough tears. This condition can become painful and may lead to corneal damage if untreated.
Allergies or irritants
Pollen, dust, smoke, shampoo, or debris can cause watery eyes and mild discharge. These cases may look minor at first but can overlap with more serious eye problems.
Foreign material or corneal injury
A grass awn, dust, scratch, or ulcer can lead to tearing, discharge, redness, and squinting. Corneal injuries are painful and should be checked promptly.
Eyelid or eyelash abnormalities
Conditions such as entropion or abnormal eyelashes can rub on the eye and cause chronic irritation, tearing, and recurrent discharge.
Respiratory or systemic illness
Eye discharge can sometimes happen along with nasal discharge, sneezing, or other signs of infection. In some dogs, eye signs are part of a broader illness rather than a problem limited to the eye.
What to Do at Home
If your dog has mild eye discharge but the eye looks comfortable and normal otherwise, gentle cleaning and close monitoring may help while you decide whether to call your vet. Because painful eye disease can look similar to minor irritation, it’s safest to contact your veterinarian if discharge is persistent, colored, or paired with redness, squinting, or rubbing.
- Gently wipe away discharge with a clean soft cloth or cotton pad dampened with warm water.
- Use a separate cloth or pad for each eye to avoid spreading irritation or infection.
- Prevent rubbing or self-trauma. A cone may help if your dog keeps pawing at the eye.
- Do not use human eye drops, leftover pet medications, or steroid eye products unless your veterinarian specifically told you to.
- Do not try to remove a deeply stuck object from the eye at home.
- Call your vet promptly if the discharge becomes thick, yellow, green, bloody, or if your dog starts squinting, acting painful, or the eye looks red or cloudy.
Frequently Asked Questions
Why does my dog have eye discharge?
When should I worry about eye discharge in dogs?
Can dog eye discharge go away on its own?
What color eye discharge is bad in dogs?
Can I clean my dog's eye discharge at home?
Sources
- MSD Veterinary Manual — Disorders of the Conjunctiva in Dogs
- MSD Veterinary Manual — Disorders of the Nasal Cavity and Tear Ducts in Dogs
- Cornell University College of Veterinary Medicine — Keratoconjunctivitis sicca (KCS) in dogs
- VCA Animal Hospitals — Urgent Care for Eye Issues
- Spectrum Care — Dog Eye Discharge: Types, Causes & When to Worry — Spectrum Care
Disclaimer: The information provided in this article is for educational purposes only and does not constitute veterinary medical advice. Reading this content does not establish a veterinarian-client-patient relationship. Every pet is different — always consult a licensed veterinarian before making decisions about your pet's health, diet, or care. If you'd like personalized guidance, you can talk to one of our vets. If your pet is experiencing a medical emergency, contact your local emergency animal hospital immediately.