A chalazion is a small bump in the eyelid caused by a blockage of a tiny oil gland.

A chalazion develops within the glands that produce the fluid that lubricate the eye. These are called Meibomian glands. The eyelid has approximately 100 of these glands, which are located near the eyelashes.

A chalazion is caused by blockage of the duct that drains one of these glands. A chalazion begins as swelling and tenderness, and later forms a cyst-like growth. Many chalazia disappear without treatment after a few months.

• Painful swelling on the eyelid
• Eyelid tenderness
• Sensitivity to light
• Increased tearing

Examination of eyelid confirms the diagnosis.

Rarely, the Meibomian gland duct may be blocked by a skin cancer. If this is suspected, a biopsy may be needed to diagnose the disorder.

A chalazion will often disappear without treatment within a month or so.

The primary treatment is application of warm compresses for 10-15 minutes at least 4 times a day. This may soften the hardened oils blocking the duct and promote drainage and healing. If the chalazion continues to get bigger, it may need to be surgically removed. This is usually done from underneath the eyelid to avoid a scar on the skin.

Antibiotic eye drops are usually used several days before and after removal of the cyst, but are otherwise of little value in treating a chalazion.

A chalazion that keeps coming back should be biopsied to rule out tumor.

Chalazia usually heal on their own. The outcome with treatment is usually excellent.

A large chalazion can cause astigmatism due to pressure on the cornea. This will resolve with resolution of the chalazion.

Apply warm compresses and call your health care provider if the swelling progresses or persists longer than 1 month.

Call for an appointment with your health care provider if lumps on the eyelid continue to enlarge despite treatment or are associated with an area of eyelash loss.

Proper cleansing of the eyelid may prevent recurrences in people prone to chalazia. Cleaning the eyelash area with baby shampoo will help reduce clogging of the ducts.

Yanoff M, Duker JS, Augsburger JJ, et al. eds. Ophthalmology. 2nd ed. St. Louis, Mo: Mosby; 2004:708.

Goldman L, Ausiello D. Cecil Textbook of Medicine, 22nd ed. Philadelphia, Pa: WB Saunders; 2004:2410.