What is the red lump in the corner of my Chihuahua's eye?
Most likely a prolapsed third eyelid gland, known as cherry eye. It is a displaced tear gland, not a tumour or a growth.
Quick answer
What is the red lump in the corner of my Chihuahua's eye?
Most likely a prolapsed third eyelid gland, known as cherry eye. It is a displaced tear gland, not a tumour or a growth.
The single most important fact about cherry eye is that the pink lump is not a growth. It is a working tear gland producing roughly a third of the eye's tear film, and cutting it off condemns the eye to a lifetime of dryness.

Owners who have woken up to a red mass in the corner of a young Chihuahua's eye and are trying to work out how urgent it is, and owners who have been offered removal versus repositioning and want to understand the difference.
This guide is not medical advice. If your dog shows pain, sudden behavior change, or worsening symptoms, consult a licensed veterinarian.
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Cherry eye is prolapse of the gland of the third eyelid. The small connective attachment holding the gland behind the third eyelid fails, and the gland flips forward to sit visibly at the inner corner of the eye as a smooth pink-red mass. It is not a tumour and not an infection. Because the gland produces a substantial share of the eye's tear film, the correct treatment is surgical repositioning rather than removal, and removal is associated with dry eye for the rest of the dog's life.
Cherry eye is seen across many breeds and is not among the Chihuahua's headline documented problems, which centre on teeth, trachea, heart, kneecaps, blood sugar and eye infections. It does occur in this breed, and when it does it is usually in a young dog. Eye problems generally are common in Chihuahuas because a shortened face produces shallow orbits and a more exposed globe.
The primary cause is a weak or absent connective anchor between the gland and the surrounding tissue of the third eyelid, and that weakness is congenital rather than acquired. Chihuahuas are not the breed most associated with cherry eye, but the breed's ocular anatomy is relevant context: a shortened muzzle produces shallow orbits and a prominent globe, the eye surface is more exposed, and eye infections are documented among the breed's common health problems. An eye that is more exposed to irritation and to inflammation is an eye whose third eyelid tissues are more often swollen, and swelling can precipitate a prolapse in a dog whose attachment was already marginal.
Environment does not cause the underlying weakness but it influences what happens afterwards. A Chihuahua allowed to rub a prolapsed gland against carpet and furniture converts an irritating problem into a corneal injury within a day. Dusty or smoky indoor air at floor level, aerosol sprays and scented products all inflame an already irritated eye. Rough play with larger dogs and walks through dense undergrowth threaten a prominent globe generally. After surgery, failure to keep a cone on is one of the more common reasons a repair is disturbed.
Book within a day or two of noticing a pink-red mass at the inner corner of the eye. It is not usually an emergency, but the gland dries and inflames while it waits. Go the same day, treating it as urgent, if the eye becomes painful, if the dog is holding it shut or squinting, if the surface of the eye looks cloudy or blue, if there is discharge, or if the dog will not stop rubbing despite a cone, since those suggest the cornea is now involved. Ask explicitly whether the plan is repositioning or removal, and if removal is proposed, ask what the reasoning is.
See all Chihuahua health problems, which breeds are prone to cherry eye, or the full Chihuahua breed guide for temperament, exercise needs and ownership costs.
Surgical repositioning is a short procedure and most dogs go home the same day. Expect a cone and prescribed drops for roughly ten to fourteen days, with the eye looking red and swollen for the first week before settling. Where recurrence happens it usually does so within weeks to a few months rather than years, so the early period is the one to watch. Dogs whose gland was removed rather than repositioned may not show dry eye immediately; it can develop over months to years, which is why the consequence is easy to underestimate at the time.
Success is a gland that stays where it belongs, a comfortable eye with no squinting or discharge, and normal tear production maintained for the rest of a life that in this breed may run to sixteen or beyond. It is not necessarily a first-time success, since revision is sometimes needed. What is not success, however tidy it looks on the day, is an eye with no visible bulge because the gland was cut out.
The tear film that keeps a cornea healthy is produced by two glands. The main lacrimal gland sits above and behind the eye. The gland of the third eyelid, the one that prolapses in cherry eye, contributes a substantial share, often quoted as somewhere around a third of the total aqueous tears.
Removing it therefore solves the visible problem and creates an invisible one. A dog missing that gland is significantly more likely to develop keratoconjunctivitis sicca, dry eye, in which insufficient tear production leaves the cornea inflamed, pigmented and eventually scarred. Dry eye is a lifelong condition requiring medication several times a day, and it is a far worse outcome than the original bulge.
Modern practice is therefore to reposition the gland rather than excise it. The commonest technique creates a small pocket in the conjunctiva of the third eyelid and tucks the gland back inside it, closing the pocket over the top so the gland is anchored where it belongs and can keep producing tears. Other techniques anchor the gland to nearby tissue.
None of these is guaranteed. Recurrence happens, and the gland can prolapse again weeks or months later, sometimes requiring a second procedure. That is a known limitation and should be discussed before surgery rather than discovered afterwards. It is still overwhelmingly preferable to removal.

Cherry eye is not usually an emergency, but the exposed gland dries out and gets rubbed, and a few hours of sensible handling improves what the surgeon has to work with.
If you think your Chi has cherry eye, the plan is three steps: write down what you have seen and when it started, book a veterinary appointment rather than waiting for the next flare, and take video of the behaviour or symptom before you go — the thing you are worried about rarely happens in the consulting room. Screening in the parents covers collapsing trachea, heart disease, patellar luxation.
What the vet visit should produce is a diagnosis and a written plan, not just reassurance: what is being ruled out, what the monitoring interval is, and which signs mean you come back sooner. Ask what the treatment costs across a year rather than per visit, because that is the number that decides whether you are managing this condition or reacting to it.
Between appointments, keep a short log — dates, what you saw, what changed. It is the single most useful thing an owner brings to a follow-up, and for cherry eye it is often what separates a clear pattern from a guess.
Perlita is a fourteen-month-old, 3.5-pound Chihuahua in Auckland whose owner Josh found a pink swelling in the corner of her left eye one morning. He was given two options at two different practices. The first quoted a quick, cheap procedure to remove the gland. The second quoted roughly twice as much to tuck it back into a pocket in the third eyelid. Josh nearly took the cheaper option, and the thing that stopped him was asking what the gland did. The answer, that it produced a large share of the tears keeping her cornea healthy, and that removing it made lifelong dry eye considerably more likely, settled it. The pocket repair held. Perlita wore a cone for twelve days and hated every hour of it. Eleven months later the right eye prolapsed too, which Josh had been warned to expect, and that one was repaired the same way.
Key takeaway: The cheaper surgery was cheaper because it removed a working organ. The right question to ask before any procedure on an eye is not what it costs but what the tissue being cut out was doing.
The prolapse itself is usually more irritating than acutely painful, but it does not stay comfortable. Exposed gland tissue dries out and becomes inflamed, the dog rubs at it, and rubbing can scratch the cornea. So while it is not an emergency in the sense that glaucoma is, it should not be left for weeks, and the discomfort increases the longer it is out.
It can appear to. Some glands prolapse and reduce again over a day or two, which tempts owners into waiting. The underlying attachment has still failed, and the great majority prolapse again and eventually stay out. A gland that has come out once should be assessed even if it has gone back by the time of the appointment.
Because it is a functioning tear gland producing a significant portion of the eye's tear film. Dogs that have had it removed are considerably more likely to develop dry eye, which means lifelong medication several times a day, chronic corneal inflammation and potential vision loss. Removal is quicker on the day and worse for the next fifteen years, which in a breed that lives this long is a long time to regret it.
Most commonly in young dogs, typically under about two years, though it can occur later. If your Chihuahua is a puppy or young adult, a sudden pink swelling at the inner corner of the eye fits the pattern well. In an older dog with no history of it, a mass in that location deserves proper examination rather than an assumption, since other things can grow there.
The prolapsed gland itself sits at the inner corner and does not usually block the visual axis, so sight is generally unaffected initially. The threats to vision are secondary: a cornea scratched by rubbing, or the dry eye that follows if the gland is removed rather than replaced. Both are avoidable with prompt, appropriate treatment.
Yes, and this should be discussed beforehand rather than being a surprise. Repositioning techniques have good but not perfect success, and recurrence can happen in the weeks or months afterwards, sometimes needing a revision procedure. Ask your vet what their approach is, what their recurrence experience has been, and what the plan would be if it prolapsed again.
Most likely a prolapsed third eyelid gland, known as cherry eye. It is a displaced tear gland, not a tumour or a growth.
No. It produces a large share of the eye's tears, and removing it substantially raises the risk of lifelong dry eye. It should be repositioned.
Not usually, but book promptly. The exposed gland dries and gets rubbed, and rubbing can scratch the cornea, which is a real problem.
No. You cannot repair the failed attachment and handling inflames the tissue. Stop the dog rubbing and get it seen.
Repositioning has good but not perfect success, and recurrence is possible. Ask about the plan for a revision before agreeing to surgery.
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