Dog Swollen Eyes for 2 Days: Causes and When to See a Vet | PawAI Lab

If your dog's eyes have been swollen for two days, this article covers what may be going on and how to decide on the next steps.

Quick Answer

Swollen eyes in dogs that persist for two days can be associated with allergies, minor injuries, insect stings, or early-stage infections. While some causes are mild and may resolve on their own, others may require veterinary attention. Monitoring your dog for additional symptoms and knowing when to seek professional guidance is important for their comfort and health.

SYMPTOM TRIAGE Not sure how serious your dog's swollen eyes are? Use our free Symptom Triage Tool to get a clearer picture of what might be happening and whether a vet visit is recommended.

What Swollen Eyes for Two Days May Look Like

When a dog's eyes remain swollen for 48 hours, the appearance and behavior changes can vary depending on the underlying cause. Pet owners may notice one or more of the following signs:

Periocular swelling: The tissue surrounding one or both eyes appears puffy or inflamed. This may affect the eyelids, the conjunctiva (the pink tissue lining the eyelids), or both.
Redness or discoloration: The affected area may appear redder than usual, or in some cases, the swelling may cause a bruised appearance.
Excessive tearing or discharge: Clear, yellow, or greenish discharge may accompany the swelling. Watery eyes are commonly associated with allergic reactions, while thicker discharge may point toward an infection.
Squinting or blinking: Your dog may keep the affected eye partially closed, blink more frequently than usual, or rub at the face with their paws.
Behavioral changes: Some dogs become less active, show reduced interest in food, or seem more irritable when the swelling persists.

It is worth noting whether one or both eyes are affected. Unilateral (one eye) swelling can be associated with a localized injury or foreign body, while bilateral (both eyes) swelling may suggest an allergy, systemic condition, or environmental irritant.

Common Causes of Swollen Eyes That Last About Two Days

Several factors can contribute to eye swelling that reaches the 48-hour mark without full resolution.

Allergic Reactions

Allergies are among the most frequent causes of swollen eyes in dogs. Environmental allergens such as pollen, grass, mold spores, and dust mites can trigger localized inflammation around the eyes. Food allergies, though less commonly isolated to the eyes alone, may also contribute to facial swelling. Allergic swelling tends to be bilateral and is often accompanied by itchiness, redness, and clear discharge.

Insect Stings and Bites

A sting or bite near the eye from a bee, wasp, spider, or other insect can produce noticeable swelling that may take one to three days to subside. This type of swelling is usually unilateral and may appear suddenly. If the swelling is severe or accompanied by difficulty breathing, hives, or vomiting, this may indicate a more serious systemic reaction that requires immediate veterinary care.

Minor Trauma or Scratch

A scratch from a branch, another animal, or even vigorous rubbing can introduce irritation or bacteria to the eye area. Swelling from minor trauma may persist for a couple of days as the tissue heals. If the scratch affects the cornea (the clear outer layer of the eye), it can be more serious and may worsen without treatment.

Foreign Body

A small foreign object, such as a grass awn, seed, or piece of debris, can become trapped under the eyelid or in the conjunctiva. This typically causes persistent squinting, pawing at the eye, and swelling that does not improve until the object is removed. Foreign bodies should be addressed by a veterinarian, as attempting removal at home risks further injury to the eye.

Early Infection

Bacterial or viral infections of the eye, commonly referred to as conjunctivitis, can cause swelling that develops or persists over the course of a day or two. Conjunctivitis may be accompanied by discharge that becomes thicker or changes color over time. Infections can spread or worsen without appropriate treatment.

What to Monitor Over the First Two Days

If your dog's eyes have been swollen for approximately 48 hours, careful observation at home can help you determine the right course of action.

Track the progression: Note whether the swelling is improving, staying the same, or getting worse. Take a photo each morning under similar lighting to compare. Improvement may indicate a mild issue that is resolving, while worsening or unchanging swelling warrants a veterinary assessment.

Check for additional symptoms: Watch for signs that go beyond the eyes, including lethargy, loss of appetite, nasal discharge, coughing, or changes in behavior. Symptoms that extend beyond the eye area may suggest a systemic condition.

Assess your dog's comfort level: If your dog is in obvious pain, rubbing the eye aggressively, or holding the eye closed, this may indicate a condition that benefits from veterinary evaluation and pain management.

Note any recent changes: Think about recent activities that may be relevant. Has your dog been in tall grass, near insects, around new animals, or exposed to cleaning products or chemicals? This information can be valuable for your veterinarian.

What You Can Do at Home

While home care does not replace professional veterinary advice, there are a few general steps that may support your dog's comfort during the initial 48-hour period.

Prevent further irritation: Use an Elizabethan collar (cone) or soft recovery collar to stop your dog from pawing or scratching at the swollen eye. This reduces the risk of additional injury.
Clean the area gently: Use a clean, damp cloth or sterile saline solution to wipe away any discharge from the eye area. Always wipe from the inner corner outward and use a fresh cloth for each eye.
Avoid home remedies: Do not apply human eye drops, ointments, or home remedies to your dog's eyes unless directed by a veterinarian. Many products formulated for humans are not safe for dogs and can worsen the condition.

When to Contact a Veterinarian

Contact a veterinarian promptly if any of the following apply:

The swelling has not improved after 48 hours
The swelling is worsening or spreading
Your dog is in visible pain, pawing aggressively at the eye, or keeping the eye tightly closed
There is thick, yellow, green, or bloody discharge
The eye itself appears cloudy or the cornea has a visible scratch or ulcer
Your dog shows systemic signs such as lethargy, fever, loss of appetite, or difficulty breathing
You suspect a foreign body is trapped in or near the eye
Your dog has a history of eye conditions that may require ongoing management

A veterinarian can perform a thorough eye examination, which may include staining the cornea, measuring tear production, and checking intraocular pressure. These assessments help identify the cause and guide appropriate treatment.

Frequently Asked Questions

Can I use human eye drops on my dog's swollen eyes?

No. Many human eye drops contain ingredients that are not safe for dogs or are formulated for conditions that differ from what your dog may be experiencing. Only use eye drops or medications that have been specifically prescribed or recommended by a veterinarian.

Is it normal for a bee sting near the eye to cause swelling for two days?

Some swelling from a bee sting may persist for 48 hours, but it should generally begin to improve within that time. If the swelling is severe, worsening, or accompanied by hives, vomiting, or difficulty breathing, seek veterinary attention immediately, as this may indicate anaphylaxis.

Should I take my dog to the vet if the swelling is only in one eye?

Unilateral swelling can be associated with a foreign body, scratch, or localized injury that may require veterinary attention to prevent complications. If the swelling does not improve within 24 to 48 hours, or if your dog seems painful, a veterinary examination is recommended.

Not sure whether your dog's symptoms need urgent attention? Try our free Symptom Triage Tool to help assess your dog's swollen eyes and get guidance on next steps.

Sources

American Veterinary Medical Association (AVMA) -- Eye Health Guidelines
American College of Veterinary Ophthalmologists (ACVO) -- Canine Eye Health Resources
Merck Veterinary Manual -- Conjunctivitis and Ocular Inflammation in Dogs
Royal College of Veterinary Surgeons (RCVS) -- Eye Problems in Dogs

Disclaimer

This article is for informational purposes only and does not constitute veterinary advice. If your dog is experiencing swollen eyes or any other health concern, consult a licensed veterinarian for a proper diagnosis and treatment plan. PawAI Lab does not diagnose, treat, or provide medical care for animals.