What Is A Chalazion?

A chalazion is a small, firm lump that forms in the eyelid when an oil-producing gland inside the lid becomes blocked. The gland, called a meibomian gland, normally releases oil that coats the surface of the eye and keeps tears from evaporating too quickly. When that oil thickens and the gland’s opening gets plugged, the trapped material builds up and the body responds with a walled-off pocket of inflammation. Unlike a stye, a chalazion is usually not infected and often not painful.

What Is A Chalazion?

A chalazion is a chronic, non-infectious lump caused by a blocked meibomian gland. It typically sits deeper in the eyelid than a stye and feels like a firm, painless bump under the skin. The name comes from a Greek word meaning “small lump.”

There are roughly 50 to 70 meibomian glands in the upper eyelid and about 20 to 40 in the lower lid. Each one opens along the lid margin, the edge where the eyelashes meet the skin. These glands release a mix of oils called meibum. That oil is the outer layer of your tear film, and it slows evaporation between blinks.

When meibum becomes too thick or the opening gets blocked, oil backs up inside the gland. The gland swells and the tissue around it becomes inflamed. The body then builds a wall of fibrous tissue around the trapped oil, forming a firm nodule. This is different from a stye, which is an acute infection of a gland or hair follicle and usually contains pus.

Chalazia can appear at any age. They are common in adults and also occur in children. Many people get them repeatedly, which usually points to an underlying problem with the oil glands rather than bad luck.

Chalazion vs. Stye: What’s the Difference?

The two look similar but behave differently. A stye, also called a hordeolum, is an infection. A chalazion is a blocked gland with inflammation but usually no infection.

An internal hordeolum, which forms in a meibomian gland, can be harder to tell apart from a chalazion. In practice, the two can overlap. A stye may leave behind a blocked gland that turns into a chalazion, and a chalazion can become infected and turn into a stye.

Why does the distinction matter? Because it changes what helps. Warm compresses and lid hygiene support both. Antibiotic ointment may be prescribed for a stye but does not treat a simple chalazion, since the problem is a blocked gland, not bacteria.

What Causes a Chalazion?

A chalazion forms when meibomian gland oil becomes too thick to flow and the gland’s opening gets blocked. Anything that changes the quality or flow of that oil raises the risk.

The most common underlying condition is meibomian gland dysfunction, a chronic problem in which the glands produce abnormal oil or become blocked over time. It is a leading cause of dry eye and frequently occurs alongside chalazia.

Other factors linked to chalazia include:

• Blepharitis, inflammation of the eyelid margins
• Rosacea, especially the ocular form
• Seborrheic dermatitis of the eyelids
• Older age, since gland function tends to decline
• Contact lens wear
• Certain medications, including some used for acne
• High cholesterol and other lipid problems

Some research suggests a link between chalazia and abnormal blood lipid levels, though the evidence is not strong enough to treat a chalazion as a sign of high cholesterol on its own. If chalazia keep returning, a clinician may look for an underlying lid condition.

One point worth clarifying: a chalazion is not caused by poor hygiene in the way people often assume. It is not contagious. You cannot catch one from someone else, and it does not spread from one eye to the other by contact.

What Are the Symptoms of a Chalazion?

The main symptom is a firm, round lump in the eyelid. It usually develops over several weeks rather than overnight.

Common features include:

• A painless or mildly tender bump in the upper or lower lid
• Swelling of the eyelid around the lump
• A feeling of heaviness or fullness in the lid
• Mild blurring if the lump presses on the eye surface
• Redness or crusting at the lid margin
• Tearing or a gritty sensation

A chalazion that grows large enough can press on the cornea and distort vision. This blurring is usually temporary and clears when the lump shrinks. A chalazion that becomes infected can turn red, warm, and painful, and may drain.

See a clinician if the lump does not improve after several weeks, keeps growing, bleeds, or changes the skin around it. A persistent eyelid lump should be evaluated to rule out other causes, including skin cancer of the eyelid. That is uncommon, but the eyelid is a site where it can appear.

How Is a Chalazion Treated?

Most chalazia clear on their own within a few weeks to a few months without treatment. Warm compresses and lid hygiene are the first steps and are widely recommended.

A warm compress works by softening the thickened oil so the gland can drain. A common approach is to apply a clean, warm, damp cloth to the closed lid for about 10 to 15 minutes, several times a day. The compress should be warm, not hot. Care is needed to avoid burning the thin skin of the lid.

Lid hygiene involves gently cleaning the lid margin to keep the gland openings clear. This is often done with diluted baby shampoo or a commercially available lid wipe. Gentle massage of the lid after a warm compress may also help express oil, though technique matters and rough pressure can irritate the eye.

When conservative care is not enough, a clinician may consider other options:

• Injection of a corticosteroid into the lump, which can shrink it
• Incision and drainage, a minor procedure done under local anesthesia
• Oral medications in selected cases, particularly when chalazia are frequent and linked to lid inflammation

Antibiotic eye drops or ointments are sometimes prescribed, but they do not treat a simple chalazion because there is usually no infection. They may be used if a stye or blepharitis is also present. The evidence for routine antibiotic use in chalazia is limited.

Do not squeeze or try to pop a chalazion at home. This can push material deeper into the lid, worsen inflammation, and in rare cases spread infection into the surrounding tissue. If a lump is growing, painful, or affecting vision, see a clinician rather than waiting it out.

Can You Prevent Chalazia?

You cannot always prevent a chalazion, but you can lower the odds by keeping the oil glands working well. The same habits that help treat one also help prevent the next.

• Practice regular lid hygiene, especially if you have blepharitis or meibomian gland dysfunction
• Use warm compresses when the lids feel congested or gritty
• Remove eye makeup fully before bed
• Replace eye makeup every few months
• If you wear contacts, follow cleaning and replacement schedules
• Manage underlying conditions like rosacea and seborrheic dermatitis

If chalazia keep coming back, it is worth asking a clinician about meibomian gland dysfunction. Treating the underlying gland problem is more useful than treating each lump as it appears. Some clinicians recommend a daily warm compress routine for people with recurrent chalazia, though formal evidence on how well this prevents new lumps is limited.

When Should You See a Doctor?

See a clinician if a lid lump does not shrink after several weeks, if it is large enough to press on the eye, or if it keeps getting bigger. These are the situations where in-office treatment may be needed.

Seek care sooner if you notice:

• Pain that is getting worse
• Redness and warmth spreading across the lid or cheek
• Fever
• Vision changes that do not clear
• An eyelid lump that bleeds or has an irregular, crusted surface

A chalazion rarely causes serious problems, but a spreading infection in the eyelid area is a reason to be seen quickly. So is any persistent lump that does not behave like a typical chalazion.