TL;DR: Swelling under a dog's eye often indicates an infection like a tooth root abscess or localized inflammation and requires veterinary attention within 24 to 48 hours. Seek emergency care immediately if your dog experiences vision loss, a bulging eye, or intense pain.
What are the most common causes of swelling under my dog's eye?
Noticing a bump or puffiness under your dog’s eye can be very concerning for any pet owner. This symptom typically points to localized inflammation or infection. Common culprits include a tooth root abscess (specifically the upper carnassial tooth), a bug bite or sting, a clogged tear duct, or even a foreign object stuck in the skin. Because the tissue near the eye is sensitive and thin, swelling can appear rapidly and look quite dramatic.
Is swelling under my dog's eye considered a veterinary emergency?
- The urgency level for this symptom is considered Medium, typically requiring professional attention within 24 to 48 hours.
- Seek immediate emergency care if the swelling is accompanied by a sudden loss of vision, a bulging eye, or if your dog is pawing at the area uncontrollably.
- These issues are often painful, and delaying treatment can lead to the infection spreading or permanent damage to the eye itself.
How does taking a photo of the swelling help the veterinarian?
- A clear, well-lit photo helps the vet see the exact location and shape of the lump to differentiate between skin-related and dental-related issues.
- Taking a series of photos over several hours allows you to track whether the swelling is expanding rapidly.
- Visual documentation provides vital diagnostic information for your pet's care team to use during the triage process.
Clinical Context (Merck Veterinary Manual)
In dogs, swelling under the eye can be caused by orbital cellulitis, orbital neoplasia, or zygomatic sialadenitis. Signs of orbital cellulitis include eyelid swelling, unilateral prolapse of the nictitating membrane, forward displacement of the globe, conjunctivitis, and acute pain on opening the mouth, seen predominantly in large and hunting breeds. Orbital neoplasms can cause exophthalmia, conjunctival and eyelid swelling, strabismus, and exposure keratitis; the globe cannot be retropulsed, and pain is usually absent. Diagnosis of orbital neoplasia requires physical examination, skull radiographs, CT, MRI, and ultrasonography to determine the extent of the mass, followed by histologic determination of the neoplasm type. In acute cases of orbital cellulitis, systemic broad-spectrum antibiotics are usually curative, but if swelling behind the last molar is present, drainage of this area is indicated, along with warm compresses and topical lubricants to protect the cornea.
Chapter: Ophthalmology, Emergency
Source: The Merck Veterinary Manual, 11th Edition (Page 504)