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Why does my dog squint or rub at one eye?
Last updated 23 September 2026 · How we write and check this
Short answer
Squinting or pawing at one eye usually signals discomfort, whether from something as minor as an eyelash or bit of dust, or something more significant like a scratch on the surface of the eye. Because it is hard to tell the cause apart from the outside, a vet check is the safest next step.
Why this differs from routine eye discharge
Ordinary tear staining or morning crust is a passive buildup, but squinting and pawing are active responses to discomfort, meaning something is bothering your dog enough to react. This distinction matters because active discomfort tends to point to something that needs attention rather than routine cleaning.
Common minor causes
A stray eyelash, a small bit of dust or grass, or a mild irritant blown into the eye on a walk can all cause a brief bout of squinting that resolves within a short time, sometimes with a bit of extra tearing that flushes the irritant out on its own.
Why persistent squinting needs a vet
Squinting or pawing that continues for more than a few hours, especially paired with visible redness, cloudiness, or your dog keeping the eye closed, can point to a corneal scratch or other issue that needs prompt treatment, since some eye injuries can worsen quickly without care.
What to check for immediately at home
Before heading to a vet, a quick look with good lighting can sometimes reveal an obvious cause, a visible eyelash caught in the corner or a bit of grass seed, that you can safely remove yourself, though if nothing is visible or your dog will not tolerate the inspection, it is best to leave further examination to a professional.
If your dog paws repeatedly at the same eye rather than just squinting, gently restraining that paw or using a soft cone temporarily can prevent your dog from accidentally scratching the surface of the eye further while you arrange a vet visit.
Key takeaways
- Squinting or pawing signals active discomfort, different from routine passive discharge.
- A brief episode from dust or an eyelash often resolves on its own within a short time.
- Persistent squinting, redness, or a closed eye needs prompt veterinary attention.