Dacryoadenitis is inflammation of the lacrimal gland, the small tear-producing gland tucked beneath the outer edge of your upper eyelid. It can be acute (caused by an infection, coming on fast) or chronic (driven by an autoimmune condition, developing gradually). The acute form is more common in children and young adults, while the chronic form tends to appear later in life and can signal a broader health issue.
What the Lacrimal Gland Does
Your lacrimal gland sits just above and to the outer side of each eye, behind the brow bone. It produces the watery layer of your tears, which keeps the surface of the eye moist, washes away debris, and delivers nutrients to the cornea. When this gland becomes inflamed, it swells, and that swelling is what causes the visible and sometimes painful symptoms of dacryoadenitis.
Acute vs. Chronic Dacryoadenitis
The two forms of dacryoadenitis look and behave quite differently, and the distinction matters because treatment depends on which type you have.
Acute dacryoadenitis is almost always caused by an infection, typically viral or bacterial. Common culprits include mumps, Epstein-Barr virus (the virus behind mono), staphylococcus bacteria, and gonococcus. It usually affects only one eye, comes on quickly, and is painful. In most viral cases, it resolves on its own without specific treatment. Bacterial cases may need antibiotics. Rarely, a fungal infection or parasite is responsible.
Chronic dacryoadenitis develops more slowly, often over weeks, and is usually painless. It is driven by ongoing inflammation rather than infection. Autoimmune and inflammatory conditions are the most common underlying causes, including sarcoidosis, IgG4-related disease (a condition where immune cells gradually infiltrate and enlarge organs), and Sjögren’s syndrome. Chronic dacryoadenitis is more likely to affect both eyes at once, and it can come back even after treatment. In older adults, bilateral swelling or symptoms like fatigue and weight loss may point to an underlying malignancy or systemic autoimmune condition that needs further workup.
Symptoms and the S-Shaped Eyelid
The hallmark of acute dacryoadenitis is swelling, redness, and tenderness concentrated over the outer upper portion of the eye socket. Because the lacrimal gland sits at the outer edge of the eyelid, the swelling pushes the outer part of the lid downward. This creates a characteristic S-shaped curve along the eyelid margin, where the inner portion of the lid looks normal but the outer portion droops. If you or a doctor notice this shape, dacryoadenitis is high on the list of possibilities.
Other signs of the acute form can include:
- Discharge from the tear ducts
- Swollen, puffy conjunctiva (the clear membrane over the white of the eye)
- Swollen lymph nodes in front of the ear or along the neck
- Fever and general fatigue
In more severe cases, the swelling can push the eyeball forward (a condition called proptosis) or restrict eye movement, making it uncomfortable to look in certain directions.
Chronic dacryoadenitis typically presents as a painless, firm swelling of the upper eyelid that persists or gradually enlarges. Because it often lacks the dramatic redness and pain of the acute form, people sometimes live with it for a while before seeking care.
How It Is Diagnosed
A doctor can often identify dacryoadenitis through a physical exam, especially when the S-shaped eyelid deformity is present. But figuring out the cause requires more investigation. Blood tests help screen for infections and autoimmune markers. CT or MRI scans of the eye socket can confirm that the lacrimal gland is enlarged and help rule out tumors or other orbital problems. On imaging, the pattern of enhancement and signal characteristics can help distinguish a benign inflammatory process from something more concerning like a malignancy.
When chronic dacryoadenitis does not respond to initial treatment, or when imaging is inconclusive, a biopsy of the lacrimal gland may be needed. This involves removing a small piece of tissue for examination under a microscope. In a study of repeated lacrimal gland biopsies, the most common reason for a second biopsy (50% of cases) was disease that did not respond well to treatment or that came back after initially improving. A biopsy is particularly important to rule out lymphoma, which can mimic chronic dacryoadenitis.
Dacryoadenitis vs. Dacryocystitis
These two conditions are often confused because their names sound similar, but they involve completely different parts of the tear system. Dacryoadenitis is inflammation of the lacrimal gland, which sits above and to the outer side of the eye and produces tears. Dacryocystitis is inflammation of the lacrimal sac, which sits along the inner corner of the eye near the nose and drains tears. Dacryocystitis typically causes swelling and tenderness near the bridge of the nose, while dacryoadenitis causes swelling at the outer upper eyelid. The causes, treatments, and implications are different for each.
Treatment and What to Expect
Treatment depends entirely on the underlying cause. Viral dacryoadenitis resolves on its own, typically with supportive care like warm compresses and over-the-counter pain relief while the infection runs its course. Bacterial dacryoadenitis requires antibiotics to clear the infection and prevent complications.
Chronic dacryoadenitis caused by an autoimmune or inflammatory condition often responds to steroids, which reduce the swelling and calm the immune response. However, the condition can follow a relapsing course, meaning it improves with treatment but returns when treatment is tapered or stopped. This pattern sometimes requires long-term management with immune-suppressing medications to maintain remission and prevent the gland from being permanently damaged.
That last point matters: chronic dacryoadenitis can lead to persistent enlargement and scarring of the lacrimal gland over time. This progressive fibrosis can permanently impair the gland’s ability to produce tears, leading to chronic dry eye. Getting the inflammation under control early gives the best chance of preserving normal gland function.
Complications of Untreated Disease
Acute dacryoadenitis that goes untreated, particularly bacterial cases, can progress to abscess formation within or around the lacrimal gland. The infection can potentially spread into the surrounding soft tissues of the eye socket. Severe cases may cause significant proptosis (forward displacement of the eye) and restricted eye movement.
For chronic dacryoadenitis, the main long-term risk is irreversible gland damage from ongoing inflammation and fibrosis. There is also the risk of missing a serious underlying diagnosis. Bilateral lacrimal gland swelling in an older adult, especially when accompanied by systemic symptoms, warrants thorough investigation to rule out lymphoma or other malignancies that can present in the lacrimal gland.