Chalazion
(Eyelid Cyst)
Medical Author: Andrew A. Dahl, MD, FACS
Medical Editor: William C. Shiel Jr., MD, FACP, FACR
Cyst Symptoms and Causes
Medical Author: Melissa Conrad Stöppler, MD
Medical Editor: William C. Shiel Jr., MD, FACP, FACR
A cyst is a closed sac- or bladder-like structure that is
not a normal part of the tissue where it is found. Cysts are common and can
occur anywhere in the body in persons of any age. Cysts usually contain a
gaseous, liquid, or semisolid substance. Cysts vary in size; they may be
detectable only under a microscope or they can grow so large that they displace
normal organs and tissues. The outer wall of a cyst is called the capsule.
Cysts can arise through a variety of processes in the body, including...
What is a chalazion?
A chalazion is a tiny lump of the upper or lower eyelid caused by inflammation of a gland of the lid. It may be soft and fluid-filled or firmer. A chalazion is also referred to as a meibomian cyst, tarsal cyst, or conjunctival granuloma.
What are these eyelid glands?
Eyelid glands are called the meibomian glands. They are also known as the palpebral glands, tarsal glands, or tarsoconjunctival glands. There are
30 to 40 of these glands in each of the upper and lower lids. The tiny openings of each of these oil or sebaceous glands are just behind the lid lashes at the lid margins. These glands produce a thick liquid secretion that is discharged into the tear film of the eye. This liquid is a mixture of oil and mucus and is called sebum. The liquid acts to lubricate the surface of the eye.
What causes a chalazion? What are the
symptoms of a chalazion?
The narrow opening through which a meibomian gland secretes its material can become clogged from narrowing of the opening or hardening of the sebaceous liquid near the opening. If this occurs, the gland will have a backup of the material it secretes and it will swell. This leads to thickening of the walls of the gland and leakage of oil into the lid itself, causing inflammation both within the gland and the eyelid. This inflamed enlargement is a chalazion.
Is a chalazion like a pimple?
If the obstructed gland has bacteria within it, the gland may become infected. This is called a hordeolum, which does resemble a pimple. A hordeolum may be tender to touch. A chalazion is not an infection but may precede a hordeolum.
How is a chalazion treated?
Most chalazions are treated with warm compresses to the eyelid to promote healing and circulation of blood to the inflamed area. In addition, the doctor may prescribe an antibiotic drop or ointment to be used immediately after the compresses. If the chalazion persists and is causing an unsightly lump, it can be removed surgically through the inside of the lid.
Last Editorial Review: 11/9/2007
- Sty (Stye) - Read about styes (hordeloa), bacterial infections of the eyelid. Learn sty causes, symptoms and treatment (OTC medication, ointment). A chalazion is often confused with a sty.
- Blepharitis - Eyelid inflammation (blepharitis) may be caused by Staphylococcal infection, allergies or head lice. Blepharitis, in turn, may cause styes, pinkeye and chalazions. Learn more.
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