Why Is My Dog’s Eye Swollen?

1 What Causes Swollen Eyes in Dogs

Internal heat from a diet that’s too dry or too salty, combined with low water intake, can trigger eye swelling. Feeding blander, low-sodium foods such as congee with millet or vegetables—sometimes with a pet nutritional supplement—helps rebalance things.

Bumps and scratches during play, or scrapes from other pets, are another common cause of red, swollen eyes.

Foreign objects like sand, dust, or a stray eyelash can irritate the eye, as can strong odors (for example formaldehyde or the smell of onion and garlic). In some cases the swelling points to an actual eye condition such as conjunctivitis.

2 Home Care and Treatment

For mild swelling from a knock or scratch—with no other symptoms—gently clean around the eye with a warm, damp cloth, then apply a dog-specific eye wash or drops (one to two drops). An antibiotic eye ointment applied once daily for about a week can help.

If a foreign body is the culprit, flush the eye with saline solution to wash it out, then use tobramycin eye drops once a day for three days.

For odor-related irritation, rinse with 0.9% saline and apply penicillin eye drops twice daily for three days while moving the dog away from the irritating environment.

When swelling comes with redness and tearing—signs of conjunctivitis—start with a saline rinse and a dog-specific chloramphenicol drop to reduce inflammation. If there’s no improvement, a veterinary visit is needed.

3 When to See the Vet

Home care works for mild, obvious causes, but if the swelling is severe, worsens, or is accompanied by discharge, pain, or no improvement after a few days, have your dog examined by a veterinarian to rule out infection or injury that needs prescription treatment.