Eyelid cyst types: chalazion, Moll and Zeis

Types of eyelid cysts are usually distinguished by where they sit and what they contain, because that difference determines both how they look and how they are managed. The three you are most likely to encounter are a chalazion, a cyst of Moll, and a cyst of Zeis. A chalazion is deep in the lid and comes from a blocked oil gland, while the other two are small surface bumps at the lash line that sit much closer to the skin. This guide walks through each type so you can describe what you are seeing to a clinician more precisely.

What is a chalazion?

A chalazion is a chronic, usually painless inflammation caused by a blocked meibomian gland, the oil gland behind the eyelashes that lubricates the eye.

When the gland opening narrows and the oily secretion thickens, it backs up and forms a firm nodule inside the lid. The lump typically appears and grows slowly over days to weeks, then may sit unchanged for weeks or months before gradually resolving. It differs from a stye, which is an acute infection of a lash follicle, usually painful, and typically settles within days. Our guide to chalazion symptoms covers the presentation in more detail.

What is a cyst of Moll?

A cyst of Moll, also called a hydatid cyst, is a clear, fluid-filled bump that forms at the base of the eyelashes from a modified sweat gland of the lid margin.

These are among the most common benign growths of the eyelid margin. They are usually tiny, translucent, and painless, and they often resemble a tiny blister or a drop of water sitting along the lash line. They are unrelated to blocked oil glands and generally do not cause the firm, rounded lump that characterises a chalazion.

What is a cyst of Zeis?

A cyst of Zeis is an oily, sebaceous bump that forms in a sebaceous gland associated with the base of an eyelash follicle.

It is the sebaceous-gland counterpart to a cyst of Moll, and the two are often described together as eyelid sebaceous cysts. A cyst of Zeis tends to be slightly yellowish or flesh-coloured rather than clear, sits on the lid surface near a lash, and is usually painless unless it becomes irritated. Both surface cyst types can enlarge or change, and that is when they are usually assessed or removed professionally.

Types of eyelid cysts: key differences

The practical takeaway: chalazia are managed mainly with compresses and, if needed, in-office procedures, while the two surface cyst types are small enough that a clinician can usually remove them quickly if they bother you.

How to tell them apart at home

1. Look at the texture. A chalazion feels solid and rounded under the skin. Cysts of Moll feel soft and fluid-filled, like a small blister.
2. Check the colour. Clear or translucent points to a cyst of Moll. Yellowish or skin-coloured, oily-looking points to a cyst of Zeis.
3. Map the position. A chalazion can sit anywhere in the lid and may only be visible from the inner surface. Cysts of Moll and Zeis sit right at the lash line where you can see them.
4. Note the speed of onset. Chalazia typically build gradually. Surface cysts often appear quickly and are noticed because of their appearance rather than any symptom.
5. Count them. A chalazion usually appears alone. Multiple small margin bumps point more toward surface cysts or toward blepharitis.
6. Watch the trend. A cyst that keeps growing, bleeds, or ulcerates needs review rather than observation, whichever type it appears to be.

Treatment options

Warm compresses

Warm compresses are the mainstay for a chalazion. Apply a warm, not scalding, compress for 10 to 15 minutes, 3 to 4 times a day, keeping hands clean each time. The heat softens the thickened oily material so it can clear the gland. Never squeeze, cut, or try to drain a chalazion yourself.

Lid hygiene

Daily lid hygiene supports a chalazion and also addresses the blepharitis that often causes recurrences. Warm compresses followed by gentle lid massage and a dilute lid scrub along the lash line is a common routine. See chalazion treatment options and eyelid bump causes for more.

Steroid injection

A steroid injection into a persistent chalazion is an in-office procedure that reduces inflammation and may help the lesion shrink without surgery. It is generally considered when conservative care has not worked after a reasonable period.

Incision and drainage

Incision and drainage opens the lesion so the trapped contents can be expressed. It is a quick office procedure, but it does not prevent the gland from blocking again in the future.

Removal of surface cysts

Cysts of Moll and cysts of Zeis that are bothersome are usually removed by a clinician, often with a fine instrument or a small incision under local anaesthetic. Home extraction is not advised near the eye. Larger chalazia that are persistent or recurrent may be removed surgically; see chalazion removal and surgery.

When to see a doctor

• The lesion has not begun to shrink after several weeks of warm compresses and lid hygiene.
• A lump keeps growing or changes character over time.
• New lesions keep appearing, or one returns in the same spot after clearing.
• The lesion bleeds, ulcerates, or the skin over it breaks down.
• Eyelashes in the area are thinning or falling out.
• There is redness, swelling, and fever, or pain when the eye moves, which needs same-day care.
• You notice any change to your vision, or the eye becomes painful rather than simply gritty.
• You are not sure which type you have, since the different types are managed differently.

Prevention

• Warm compress the lids at the first sign of a tender spot rather than waiting for it to harden.
• Clean the lash line daily if you have recurrent chalazia or blepharitis.
• Replace eye makeup regularly and remove it before bed.
• Avoid rubbing the eyes, which spreads oils and irritates the margin.
• Keep hands off surface cysts rather than picking at them.
• Have recurrent cysts assessed, because treating the underlying lid inflammation is what reduces recurrence.

FAQ

What is the most common type of eyelid cyst?

A chalazion is the most common, because it results from blockage of an oil gland that is naturally prone to narrowing. Surface cysts of Moll and Zeis are less common overall.

Are cysts of Moll the same as chalazia?

No. A cyst of Moll is a clear, fluid-filled bump at the lash line from a sweat gland, whereas a chalazion sits deeper in the lid and comes from a blocked oil gland.

Do eyelid cysts need to be removed?

Often not. A chalazion usually settles with warm compresses over time, and small surface cysts may be left alone, but persistent, painful, or growing lesions should be assessed by a clinician.

Can I squeeze a cyst of Moll at home?

No. Squeezing near the eye can spread infection and damage the lid margin. Professional removal by a clinician is the safe route for a cyst that needs removing.

Why do chalazia come back?

Recurrence is common because the same gland can block again, particularly if blepharitis is present. Recurrent or multiple lesions are worth evaluating rather than repeatedly treating at home.

Which eyelid cyst type is most likely to cause vision problems?

A large chalazion is the type most likely to press on the eye surface and distort vision. Any change to your vision should still be checked promptly.

Sources

• StatPearls: Chalazion
• American Academy of Ophthalmology: Chalazion
• Cleveland Clinic: Chalazion

This article is for general information and is not medical advice.