What Is a Chalazion?
A chalazion is a painless or mildly tender lump that forms in the upper or lower eyelid when a meibomian gland becomes blocked. The meibomian glands are small oil-producing glands inside the eyelid that release oils into the tear film to prevent tears from evaporating too quickly. When one of these glands becomes obstructed, the trapped oil causes the gland to swell and form a firm, round bump beneath the skin of the eyelid.
Chalazia are one of the most common eyelid conditions and are not caused by infection, though a stye (hordeolum) that does not resolve can develop into a chalazion. Most chalazia are harmless and resolve on their own, but larger or persistent lumps may require treatment at West Boca Eye Center.
Chalazion vs. Stye: What Is the Difference?
A chalazion and a stye can look similar but have different causes and characteristics:
- Stye (hordeolum): An acute bacterial infection of an eyelash follicle or oil gland at the eyelid margin. Styes are typically painful, red, and tender to the touch. They form near the edge of the eyelid and often come to a visible head like a pimple.
- Chalazion: A non-infectious blockage of a meibomian gland deeper within the eyelid. Chalazia are usually painless or only mildly tender, firmer in texture, and located further from the eyelid edge. They develop more slowly than styes and tend to persist longer.
A stye that does not drain and heal within a few days can evolve into a chalazion as the acute infection resolves but the blocked gland remains swollen. Both conditions benefit from warm compresses, but treatment approaches differ for persistent cases.
Causes and Risk Factors
A chalazion forms when the opening of a meibomian gland becomes blocked, trapping oil inside the gland and triggering a localized inflammatory response. Factors that increase the risk of developing a chalazion include:
- Blepharitis: Chronic eyelid inflammation is the most common underlying cause. Patients with blepharitis have a significantly higher rate of chalazia due to ongoing meibomian gland dysfunction.
- Rosacea: Facial and ocular rosacea increase meibomian gland obstruction and eyelid inflammation.
- Seborrheic dermatitis: Dandruff-related skin conditions affect the oil glands of the eyelids.
- Previous chalazia: Patients who have had one chalazion are more likely to develop additional ones.
- Poor eyelid hygiene: Infrequent cleansing of the eyelid margins allows debris and bacteria to accumulate around the gland openings.
- Hormonal changes: Fluctuations in hormone levels can alter the consistency of meibomian gland secretions, making blockages more likely.
- Contact lens wear: Handling and wearing contact lenses increases exposure to bacteria near the eyelids.
Symptoms of a Chalazion
A chalazion typically develops over several days to weeks and presents with the following symptoms:
- A firm, round, painless or mildly tender bump on the upper or lower eyelid
- Localized swelling of the eyelid around the lump
- Mild redness of the eyelid skin overlying the bump
- A sensation of heaviness or fullness in the affected eyelid
- Blurred vision if the chalazion is large enough to press against the eyeball and distort the cornea
- Tearing or watery eyes on the affected side
Most chalazia range in size from a few millimeters to about the size of a pea. They are most common on the upper eyelid because the upper lid contains more meibomian glands than the lower lid.
How a Chalazion Is Diagnosed
Diagnosis is typically straightforward. At West Boca Eye Center, the doctor performs a visual examination of the eyelid to assess the size, location, and characteristics of the lump. In most cases, no additional testing is needed. If the chalazion recurs in the same location, a tissue sample may be taken to rule out a rare eyelid tumor that can mimic the appearance of a chalazion.
Treatment Options
Treatment depends on the size of the chalazion, how long it has been present, and whether it is causing symptoms.
At-Home Treatment
The majority of chalazia respond to conservative home care:
- Warm compresses: Apply a clean, warm, moist washcloth to the closed eyelid for 10 to 15 minutes, three to four times daily. The heat helps soften the blocked oil and encourages the gland to drain naturally.
- Gentle eyelid massage: After applying the warm compress, use a clean fingertip to gently massage the area around the chalazion in a circular motion toward the eyelid margin. This helps express the trapped oil from the gland.
- Lid hygiene: Clean the eyelid margins daily with a gentle eyelid cleanser or diluted baby shampoo to prevent recurrence.
With consistent warm compresses, most chalazia begin to shrink within two to four weeks and resolve completely within four to six weeks.
Medical Treatment
If the chalazion does not respond to home care after four to six weeks, medical intervention may be recommended:
- Steroid injection: A small amount of corticosteroid is injected directly into the chalazion to reduce inflammation and promote resolution. This is effective for medium-sized chalazia and avoids the need for surgery in many cases.
- Antibiotic ointment or drops: Prescribed when there is a secondary bacterial infection or when blepharitis is an underlying contributor.
- Oral antibiotics: Low-dose doxycycline may be prescribed for patients with recurrent chalazia related to meibomian gland dysfunction or rosacea.
Surgical Drainage (Incision and Curettage)
For large, persistent, or visually obstructing chalazia that do not respond to compresses or injection, a minor in-office procedure can remove the contents of the lump:
- The eyelid is numbed with a local anesthetic.
- A small clamp is placed on the eyelid to isolate the chalazion.
- A tiny incision is made on the inner surface of the eyelid (not the outer skin), so there is no visible scar.
- The contents of the blocked gland are drained and curetted (scraped clean).
- An antibiotic ointment is applied and the eye is patched for a few hours.
The procedure takes approximately 15 minutes and most patients return to normal activities the following day. Mild bruising and swelling of the eyelid are common for several days after the procedure.
How to Prevent Chalazia
Patients prone to recurrent chalazia can reduce the frequency of new lumps by following these preventive measures:
- Perform daily warm compresses and eyelid hygiene, especially if you have blepharitis or meibomian gland dysfunction
- Avoid touching or rubbing your eyes with unwashed hands
- Remove all eye makeup thoroughly before bed
- Replace eye makeup products every three to six months to prevent bacterial contamination
- Clean contact lenses properly and replace them on the recommended schedule
- Treat underlying conditions such as blepharitis, rosacea, or seborrheic dermatitis
When to See a Doctor
While most chalazia are harmless, you should schedule an evaluation if:
- The lump does not improve after four to six weeks of warm compresses
- The chalazion grows rapidly or becomes very large
- The lump is painful, very red, or warm to the touch, which may indicate infection
- Your vision becomes blurred due to the size of the bump
- You develop chalazia repeatedly in the same location
- Changes in the eyelid skin or eyelash growth occur near the lump
Frequently Asked Questions
Is a chalazion dangerous?
No. A chalazion is a benign condition and is not dangerous. However, large or persistent chalazia should be evaluated to rule out other eyelid conditions and to prevent complications such as corneal distortion from prolonged pressure on the eye.
How long does a chalazion last?
Most chalazia resolve within four to six weeks with consistent warm compress treatment. Some resolve faster, while others may persist for several months without medical intervention. Chalazia that do not improve after six weeks should be evaluated for steroid injection or surgical drainage.
Can a chalazion come back after treatment?
Yes. Patients with underlying blepharitis, meibomian gland dysfunction, or rosacea are more prone to recurrent chalazia. Consistent eyelid hygiene and treatment of the underlying condition significantly reduce the recurrence rate.
Should I pop or squeeze a chalazion?
No. Never attempt to squeeze, pop, or lance a chalazion at home. This can cause infection, worsen inflammation, and lead to scarring. Warm compresses are the safe and effective way to encourage the gland to drain on its own. If drainage is needed, it should be performed by an eye care professional in a sterile environment.
Will a chalazion affect my vision?
Most chalazia do not affect vision. However, a large chalazion on the upper eyelid can press against the cornea and temporarily distort vision, causing mild astigmatism-like blurring. Vision returns to normal once the chalazion is treated and resolves.
