Dog Cherry Eye: What It Is, Why It Happens, and How to Help Your Dog

Noticing something unusual in your dog’s eye can be alarming, especially when it seems to appear out of nowhere. If you’ve spotted a red, fleshy mass peeking out from the corner of your dog’s eye, you’re likely looking at a condition commonly known as cherry eye. While it may look alarming, the good news is that it’s a treatable condition, and understanding what’s happening is the first step toward getting your dog the help they need.

Common Causes

Cherry eye occurs when the gland of the third eyelid — a structure dogs have that humans don’t — prolapses, or slips out of its normal position. This gland, known as the nictitating membrane gland, is responsible for producing a significant portion of your dog’s tear film, estimated at up to 30–35% of total tear production. When the connective tissue that anchors it in place weakens or fails, the gland pops out and becomes visible as that telltale red bump in the inner corner of the eye.

While the exact cause isn’t always clear, several factors are known to increase your dog’s risk of developing cherry eye:

• Genetics and breed predisposition: Certain breeds are far more likely to develop cherry eye due to the inherited anatomy of their eyes. Brachycephalic (short-nosed) breeds such as Bulldogs, Pugs, French Bulldogs, and Boston Terriers are among the most commonly affected. Cocker Spaniels, Beagles, and Basset Hounds are also on the higher-risk list.
• Weakness of the connective tissue: In some dogs, the ligament that holds the third eyelid gland in place is simply not strong enough, allowing the gland to prolapse under normal conditions.
• Age: Cherry eye is most frequently seen in young dogs under the age of two, though it can occur at any age.
• Inflammation or irritation: Eye irritation or inflammation can sometimes contribute to gland prolapse, particularly if the area around the eye is already compromised.
• Bilateral occurrence: Once cherry eye develops in one eye, there is a meaningful chance it may eventually develop in the other eye as well, especially in predisposed breeds.

From a diagnostic standpoint, your vet can typically identify cherry eye on visual examination alone — the prolapsed gland is usually unmistakable. However, they’ll also assess the health of the gland tissue itself, check for signs of secondary infection, and evaluate tear production using a Schirmer tear test. This test measures how much moisture the eye produces and helps determine whether the prolapse has already begun to affect tear function.

Age plays a meaningful role in how cherry eye presents and progresses. Puppies and young dogs are disproportionately affected, likely because the connective tissue holding the gland is still maturing and may not yet be strong enough to withstand normal eye movement and pressure. In older dogs, prolapse is less common but can still occur, particularly following trauma, infection, or significant inflammation in the eye area. There’s no strong seasonal pattern associated with cherry eye, but dogs that spend more time outdoors in dusty or allergen-heavy environments may experience more eye irritation, which could potentially contribute to gland instability in already predisposed individuals.

It’s also worth noting that cherry eye is not contagious and is not caused by anything a pet owner did or didn’t do. It’s a structural issue — one that’s rooted in genetics far more often than in circumstance. If your dog develops it, the most important thing you can do is respond promptly and get them evaluated.

Symptoms to Watch For

Cherry eye is one of those conditions that’s often hard to miss once it appears, but there are several signs worth monitoring closely. The symptoms can range from the initial prolapse to secondary complications that develop if the condition goes untreated.

Here’s what to look out for in your dog:

• A red or pink fleshy mass in the inner corner of one or both eyes — this is the hallmark sign of cherry eye
• Excessive eye discharge that may be watery, mucous-like, or crusty
• Pawing or rubbing at the eye, which suggests your dog is experiencing discomfort or irritation
• Swelling or inflammation around the affected eye
• Dry eye symptoms, such as a dull or hazy appearance to the eye’s surface, which can occur if the prolapsed gland is no longer functioning properly
• Squinting or keeping the eye partially closed, indicating sensitivity or pain
• Redness of the white part of the eye (sclera), sometimes accompanying the prolapse

If you notice any of these signs, it’s important not to wait too long before seeking veterinary advice. The longer the gland remains prolapsed and exposed, the higher the risk of permanent damage to both the gland itself and your dog’s overall eye health.

Symptom Severity at a Glance

Symptom	Risk Level	Action Required
Small red mass in inner corner, dog unbothered	Mild	Schedule a vet appointment within a few days
Watery or mucous discharge from the eye	Mild	Monitor closely; mention at vet visit
Pawing or rubbing at the eye	Moderate	Call your vet within 24 hours
Yellow or green discharge from the eye	Moderate	Call your vet promptly — possible infection
Swollen, inflamed eyelid area	Moderate	Call your vet within 24 hours
Squinting, pain, or reluctance to open eye	Serious	Contact your vet today
Dull, hazy eye surface or visible dry eye signs	Serious	Seek veterinary evaluation immediately

Breeds Most at Risk

While any dog can technically develop cherry eye, certain breeds are far more predisposed due to their inherited anatomy and eye structure.

English Bulldogs and French Bulldogs top the list. Their brachycephalic skull shape creates shallower eye sockets and altered eyelid tension, which places greater mechanical stress on the connective tissue holding the third eyelid gland in place. This anatomical quirk means the gland is more likely to slip out of position, even without any triggering event.

Cocker Spaniels are another high-risk breed, and interestingly, cherry eye in Cockers tends to present at a slightly older age than in brachycephalic breeds. Research and clinical observation consistently show that Cocker Spaniels have a hereditary weakness in the retinaculum — the fibrous tissue that anchors the gland — making prolapse far more likely across the breed as a whole.

Beagles and Basset Hounds round out the commonly affected group. These breeds have loose, droopy eyelid anatomy that, combined with genetic predisposition, creates an environment where the third eyelid gland has less structural support. Owners of these breeds should be especially vigilant about monitoring their dogs’ eyes, particularly during the first two years of life.

If you have one of these breeds, it’s worth having a proactive conversation with your vet about what to watch for — even before any symptoms appear.

What You Can Do at Home

It’s completely natural to want to help your dog the moment you notice something is wrong. However, it’s important to understand that cherry eye cannot be resolved at home, and attempting to manually push the gland back into place without veterinary guidance is not recommended. Doing so can cause further irritation, introduce bacteria, or injure the delicate tissue of the eye.

That said, there are a few practical steps you can take while you arrange a veterinary appointment:

Keep the area clean and moist. Gently wiping away any discharge around your dog’s eye with a clean, damp cloth can help prevent secondary infection and keep your dog more comfortable. Avoid using anything with alcohol, fragrance, or harsh chemicals near the eye.

Use veterinarian-approved eye lubricant. If your vet has previously recommended a lubricating eye drop or gel for your dog, applying it carefully can help keep the exposed gland from drying out. If you don’t already have one on hand, ask your vet before using any over-the-counter product.

Prevent your dog from rubbing the eye. An e-collar (the cone your vet may provide) can be helpful in preventing your dog from pawing at their eye and causing additional irritation or trauma.

Monitor for changes. Keep a close eye on the size of the mass, the amount of discharge, and your dog’s behavior. If the eye becomes more swollen, the discharge turns yellow or green, or your dog seems to be in increasing pain, contact your vet promptly.

When to See a Vet

Cherry eye should always be evaluated by a veterinarian. While it isn’t a life-threatening emergency, it does require professional treatment to resolve properly — and the sooner you act, the better the outcome tends to be.

Most veterinarians will recommend surgical correction to reposition the prolapsed gland back into its normal location. This approach is strongly preferred over removing the gland entirely, since the gland contributes meaningfully to your dog’s tear production. Removing it can lead to a chronic condition called dry eye (keratoconjunctivitis sicca), which requires lifelong management and can significantly affect your dog’s quality of life.

You should contact your vet promptly if:

• You first notice the red mass in the corner of your dog’s eye
• The mass grows larger or changes in appearance
• Your dog is actively pawing at or rubbing the eye
• You notice discharge that is yellow or green in color
• Your dog appears to be squinting, in pain, or reluctant to open the eye
• The condition appears to be affecting both eyes

Early intervention gives the best chance for a full recovery and helps protect the long-term health of your dog’s eyes. Your vet may refer you to a veterinary ophthalmologist for surgery, particularly in complex or recurrent cases.

How Pet Insurance Can Help

Surgical treatment for cherry eye can range from a few hundred to over a thousand dollars, depending on your location, whether one or both eyes are affected, and whether the case requires a specialist. Having a pet insurance plan in place before these situations arise can make a significant difference in both your stress levels and your ability to say yes to the care your dog deserves.

Protective Care: Get a free pet insurance quote and protect your dog today

For times when you need immediate guidance from a licensed veterinarian without leaving home, telehealth services can be a lifesaver.

For more clinical details on canine health, you can refer to the professional guidelines from the Merck Veterinary Manual.

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Cherry eye is one of those conditions that can feel scary in the moment, but with the right veterinary care, most dogs recover beautifully and go on to live happy, healthy lives. Trust your instincts, reach out to your vet as soon as you notice something is off, and know that catching it early puts your dog in the best possible position for a smooth recovery. You’re already doing the right thing by learning more — your dog is lucky to have someone looking out for them.