Veterinary advice

Red eyes and eye discharge in pets: when to seek help

Tearing, discharge, squinting or rubbing the eye may signal irritation, infection, trauma or a painful eye injury.

2026-08-19

Veterinarian examining a cat eye in a clinic

Why eye symptoms should not be treated as minor

Redness, tearing or eye discharge may look like mild irritation, but sometimes it hides trauma, a foreign body, corneal injury, infection or significant pain. Eyes are sensitive and delay can make healing harder.

If the animal squints, avoids light, rubs the eye or does not allow the head to be touched, pain is likely. Examination should not be delayed, even if discharge is not heavy.

Common warning signs

Red conjunctiva, heavy tearing, yellow or green discharge, stuck eyelids, swelling, cloudy eye, visible third eyelid or sudden vision change are warning signs. A one-eye problem may suggest trauma or a foreign body.

Both eyes may react because of infection, allergy, environmental irritation or a general illness. The cause cannot be confirmed by appearance alone.

What not to do at home

Do not use human eye drops, leftover antibiotics or irritating liquids. Some products are unsuitable for animals or dangerous when the cornea is injured. Avoid deep cleaning with cotton buds.

Before the visit, discharge can be gently wiped from the outer area with a clean damp cloth without rubbing the eye. If the pet scratches the eye, a protective collar may be needed.

What the veterinarian checks

The veterinarian assesses eyelids, conjunctiva, cornea, pupils, type of discharge and general condition. A staining test or other diagnostics may be needed to check for corneal damage.

Treatment depends on the cause. Some cases need anti-inflammatory treatment, others antibiotics, eye protection, removal of a foreign body or further diagnostics.

When to seek urgent help

Seek help sooner if the eye suddenly closes, the animal rubs it intensely, the eye is cloudy, there is blood, trauma occurred, the eye bulges or vision seems affected. These signs should not wait until tomorrow.

Eye problems usually respond better when treatment starts early. A professional check can prevent unsuitable drops and a longer recovery.

FAQ

Can I use human eye drops?

Not without veterinary advice. Some drops are unsuitable for animals, especially if the cornea is damaged.

Does eye discharge always mean infection?

No. Irritation, allergy, trauma, a foreign body or other eye disease may be involved.

When is an eye problem urgent?

When the pet squints strongly, rubs the eye, the eye is cloudy or swollen, trauma occurred or vision suddenly changes.

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