A swollen lacrimal caruncle, that small pink mound of tissue in the inner corner of your eye, is almost always caused by something benign. The most common culprits are harmless growths like nevi (moles) and papillomas, which together account for the majority of caruncle lesions. Less often, the swelling traces back to an infection, a blocked gland, an allergic or chemical irritation, or a systemic condition like thyroid eye disease. Rarely, malignant tumors can develop there, which is why any persistent or changing swelling deserves a professional look.
What the Lacrimal Caruncle Actually Is
The lacrimal caruncle is the soft, fleshy bump sitting at the innermost corner of your eye, right next to the nose. It is not part of the eyeball itself. It is a small island of modified skin that contains sebaceous (oil) glands, sweat glands, tiny hair follicles, and sometimes accessory lacrimal (tear) gland tissue. Because it packs so many different tissue types into such a small space, the caruncle can develop an unusually wide variety of lesions compared to most other structures in the eye area. A large clinicopathologic study confirmed both the low frequency of caruncular lesions overall and the surprisingly broad range of types that do occur there.
The Most Likely Causes of a Swollen Caruncle
If you notice a bump or swelling on your caruncle, odds are strong that it falls into one of a few benign categories. A systematic review of caruncular lesions found that the most common benign growths were nevi, papillomas, and pyogenic granulomas.1PubMed Central. Clinical profile, histopathology, and management of caruncular lesions; a systematic review Nevi and papillomas are the two most common tumors arising independently from the caruncle, with nevi making up roughly a third to over half of all caruncular tumors and papillomas accounting for about a fifth to a third.2PubMed Central. Lacrimal Caruncle Nevus with Papilloma
Nevi
A caruncular nevus is essentially a mole on the caruncle. It appears as a raised, well-defined bump that is often tan or brown, though it can also be flesh-colored. Many people have had one since childhood without ever noticing it. These nevi may look slightly cystic and can have tiny blood vessels running through them. They tend to grow slowly or not at all, and the vast majority are completely harmless. A nevus that has been stable for years and suddenly becomes swollen or changes color, however, warrants an eye exam, since those shifts can occasionally signal something more serious.3PubMed Central. Pigmented Nevus of the Caruncle and Plica Semilunaris: A Case Report
Papillomas
Papillomas are wart-like growths, often with a bumpy or finger-like surface texture. On the caruncle they tend to be pink or flesh-colored, and they can appear at any age. Some are linked to the same human papillomavirus (HPV) strains that cause skin warts. They are benign, but because they sit in the corner of your eye, a papilloma can feel like something is constantly rubbing or irritating. Larger ones may also cause tearing by physically blocking the drainage pathway near the puncta.
Pyogenic Granulomas
Despite the intimidating name, a pyogenic granuloma is neither infectious nor truly a granuloma. It is a small, rapidly growing mass of blood vessels and inflammatory tissue that usually forms after minor trauma, surgery, or chronic irritation. On the caruncle, it often appears as a bright red, easy-to-bleed bump. Most vascular lesions reported at the caruncle site are classified as pyogenic granulomas, which underscores how rare other vascular tumors are in that location.4PubMed Central. Capillary hemangioma of the caruncle: A case report and review of the literature
Gland-Related Swelling and Cysts
Because the caruncle houses multiple types of glands, glandular issues are a distinct and fairly common source of swelling. Sebaceous gland hyperplasia, where the oil glands simply enlarge and become more prominent, can make the caruncle look puffy or lumpy. In one reported case, bilateral caruncle swelling turned out to be sebaceous gland hyperplasia with inflammatory changes around the glands, along with a retention cyst on one side that may have been triggered by infection or long-term steroid use.5PubMed Central. Bilateral lacrimal caruncle lesions
Retention cysts form when a gland’s duct gets blocked and fluid builds up behind the blockage. These feel like smooth, rounded bumps and are usually painless unless they become inflamed. Ductal cysts of the accessory lacrimal glands can also appear in the caruncle. These cysts are benign and straightforward to manage, but they can look alarming because the caruncle is so small that even a minor cyst is noticeable.
A rarer glandular growth is the oncocytoma, a benign tumor made up of cells packed with mitochondria. It tends to appear in older adults, especially women, and grows slowly over months or years. Oncocytomas have an excellent prognosis and have not been reported to recur after removal from the caruncle.6PubMed Central. Oncocytoma: a rare neoplasm of the caruncle One case report described a slowly growing oncocytoma in an 81-year-old woman, which is typical of the profile these tumors follow.7Tumori Journal. Oxyphil Cell Adenoma (Oncocytoma) of the Lacrimal Caruncle: A Case Report
Infections and Inflammation
An infected or inflamed caruncle can swell rapidly and become red, tender, or crusty. Simple bacterial conjunctivitis or a stye near the inner corner of the eye can involve the caruncle secondarily. A less obvious culprit is canaliculitis, an infection of the tiny drainage channel (canaliculus) that sits right next to the caruncle. Canaliculitis is uncommon and frequently misdiagnosed because it mimics more familiar conditions like a stye or chronic conjunctivitis. If the caruncle area stays red and irritated despite standard treatment, canaliculitis should be considered, since untreated cases can lead to recurring inflammation and obstruction of the upper tear drainage system.8PubMed Central. Lacrimal canaliculitis
Dacryocystitis, an infection of the tear sac (lacrimal sac) located just below and behind the caruncle, is another common source of confusion. The swelling and redness of dacryocystitis often extends outward to involve the caruncle, making it look like the caruncle itself is the problem. Pressing on the swollen tear sac area sometimes produces a discharge from the punctum, which helps distinguish it from a true caruncular lesion.
Thyroid Eye Disease and the Caruncle
A cause that catches many people off guard is Graves’ ophthalmopathy, the eye-related manifestation of Graves’ disease (an autoimmune thyroid condition). Inflammation from Graves’ disease can target the soft tissues around the eye, and the caruncle is no exception. In patients with active Graves’ ophthalmopathy, a swollen caruncle can physically block tear drainage at the punctum, causing constant watering of the eye (epiphora). A small case series found that surgically excising the swollen caruncle tissue resolved the tearing completely in all treated eyes over follow-up periods of six to eighteen months, with no complications such as dry eye or damage to the drainage structures.9PubMed Central. Caruncle excision to treat epiphora caused by caruncle swelling in patients with active Graves’ ophthalmopathy: case series
If you have a known thyroid condition and notice inner-corner swelling alongside tearing, bulging eyes, or eyelid retraction, the caruncle swelling might be part of the broader thyroid eye picture rather than an isolated problem.
External Triggers and Irritants
Not every swollen caruncle has a growth or infection behind it. The inner corner of the eye is a catchment zone for debris, makeup residue, and chemical irritants. Contact lens solution, eyelash adhesive, and cosmetic products can all trigger localized inflammation if they pool in the inner corner. Reactions to permanent eyeliner tattoo ink have been reported to cause blepharitis, dermatitis, granulomas, and recurring inflammation in the eye area.10PubMed Central. Chemical conjunctivitis and diffuse lamellar keratitis after removal of eyelash extensions Eyelash extension adhesive is another known offender. If your caruncle became swollen shortly after a cosmetic procedure around the eyes, the timeline itself is a strong diagnostic clue.
Allergic reactions to airborne triggers like pollen, pet dander, or dust mites often affect the inner corner of the eye prominently, since the caruncle and surrounding folds trap allergens. This type of swelling tends to be bilateral (both eyes), itchy, and seasonal or exposure-related. Antihistamine eye drops usually settle it within a day or two.
When Swelling Could Signal Something Serious
Malignant tumors of the caruncle are rare, but they do exist, and the caruncle’s mix of tissue types means several different cancers can originate there. A systematic review identified basal cell carcinoma, sebaceous cell carcinoma, and melanoma as the primary malignant lesions seen at this site.1PubMed Central. Clinical profile, histopathology, and management of caruncular lesions; a systematic review Primary basal cell carcinoma of the caruncle is described as extremely rare but a distinct entity, having been reported even in a patient as young as 24.11PubMed. Primary basal cell carcinoma of the caruncle
Sebaceous gland carcinoma is an uncommon malignancy that most often appears in the periocular (around-the-eye) area, usually in older women. It has a reputation for aggressive behavior, with high rates of local recurrence and the potential for regional and distant spread.12PubMed Central. Sebaceous gland carcinoma of the eyelid Melanoma, meanwhile, carries the highest risk of recurrence among caruncular malignancies. The caruncle and nearby plica semilunaris are considered unfavorable locations for conjunctival melanoma because tumors there are associated with higher recurrence rates and worse outcomes compared to melanomas in other parts of the conjunctiva.3PubMed Central. Pigmented Nevus of the Caruncle and Plica Semilunaris: A Case Report
Clinical features that raise concern for malignancy in a caruncular growth include rapid growth over weeks to months, new or increasing pigmentation, an ulcerated surface, and bleeding.13PubMed Central. Malignant lesions of the caruncle Older age at presentation, a personal or family history of skin cancer or dysplastic nevus syndrome, and the absence of the tiny intrinsic cysts that are common in benign nevi also tilt the picture toward further investigation.3PubMed Central. Pigmented Nevus of the Caruncle and Plica Semilunaris: A Case Report None of these features is a guaranteed sign of cancer, but they are the reasons ophthalmologists recommend a lower threshold for biopsy at this particular location.
How Caruncle Swelling Is Evaluated and Treated
Your eye doctor will typically start with a slit-lamp exam, which gives a magnified view of the caruncle and surrounding structures. For straightforward cases like allergic swelling or a small stye, the diagnosis can often be made on appearance alone, and treatment is conservative: warm compresses, antihistamine drops, or a short course of antibiotic ointment. If a canaliculitis is suspected, the doctor may express material from the canaliculus to confirm the diagnosis and then treat with irrigation, probing, or topical antibiotics.
For any discrete mass on the caruncle, excision is the standard approach. Because the range of possible lesion types is so broad, including some that overlap in clinical appearance, histopathological examination of the removed tissue is recommended to confirm the diagnosis and rule out malignancy.6PubMed Central. Oncocytoma: a rare neoplasm of the caruncle This is a minor outpatient procedure done under local anesthesia. The surgeon removes the growth while trying to preserve the surrounding caruncle tissue and, critically, the nearby lacrimal puncta (the tiny tear drainage openings). For benign growths, simple excision is usually curative.
Malignant lesions require more aggressive management. Treatment involves excision with margin control, meaning the surgeon removes extra surrounding tissue and checks it under the microscope to ensure no cancer cells remain at the edges. In rare, extensive cases, a more radical procedure may be necessary.1PubMed Central. Clinical profile, histopathology, and management of caruncular lesions; a systematic review Metastasis to nearby lymph nodes has been reported with caruncular malignancies, so follow-up monitoring after treatment is important.13PubMed Central. Malignant lesions of the caruncle
Common Misconceptions About the Inner Eye Corner
Many people look up caruncle swelling and immediately land on the worst-case scenario. The internet has a way of making rare cancers feel imminent. In reality, caruncular lesions of any kind are uncommon to begin with, and among those that do occur, the overwhelming majority are benign.14PubMed. Lesions of the lacrimal caruncle. Clinicopathologic features The wide variety of possible types is what makes the caruncle interesting to pathologists, not a sign that your swelling is likely to be something dangerous.
Another common confusion is mistaking the caruncle for the lacrimal sac. When people feel a bump near the inner corner of the eye and search for answers, they sometimes conflate the two structures. The lacrimal sac sits deeper, behind the bone just below the inner corner, while the caruncle is the visible soft tissue right at the corner. Dacryocystitis (tear sac infection) causes a painful, deep swelling slightly below and to the nose-side of the caruncle. A true caruncular lesion sits on the surface, visible when you gently pull the lower lid down and look at the inner corner.
People also sometimes confuse a swollen caruncle with a pinguecula or pterygium, which are growths on the white of the eye (conjunctiva) that tend to occur on the nasal side. These are degenerative changes related to UV exposure and dryness, and while they can abut the caruncle area, they originate from different tissue and require different management.
The Caruncle’s Role in Eye Surgery
The caruncle is more than a passive bystander in ophthalmic surgery. Its position makes it a useful anatomical landmark. Research mapping the origin of the inferior oblique muscle, one of the six muscles that move the eye, found that this muscle originates on average about 1.2 mm to the side of and about 11 mm below the tip of the caruncle.15PubMed. Location of the inferior oblique muscle origin with reference to the lacrimal caruncle and its significance in oculofacial surgery Surgeons performing procedures on the inner orbital wall, tear drainage system, or eye muscles use the caruncle as a reference point. This is part of why preserving caruncle integrity during lesion removal matters: damaging it can affect surgical planning for unrelated procedures down the line and potentially compromise tear drainage.
In medial (inner-side) orbital surgeries, the caruncle sometimes serves as the access point. Surgeons can make an incision through or beside the caruncle to reach the bone behind it, repair fractures, or decompress the orbit in severe thyroid eye disease. After such surgeries, temporary caruncle swelling is expected and typically resolves on its own within a few weeks.