Styes and chalazia are lumps in or along the edge of an eyelid. They may be painful or annoying, but they are rarely serious. Most will go away on their own without treatment.
Styes and chalazia may be related to blepharitis, a common problem that causes inflammation of the eyelids.
Styes are caused by a bacterial infection. Usually the bacteria grow in the root (follicle) of an eyelash. An internal hordeolum is caused by infection in one of the tiny oil glands inside the eyelid.
A chalazion forms when an oil gland in the eyelid becomes blocked. If an internal hordeolum doesn't drain and heal, it can turn into a chalazion.
A stye usually starts as a red bump that looks like a pimple along the edge of the eyelid.
A chalazion starts as a firm lump or cyst under the skin of the eyelid.
Doctors diagnose these problems by closely examining the eyelid. It may be hard to tell the difference between a stye and a chalazion. If there is a hard lump inside the eyelid, the doctor will probably diagnose it as a chalazion.
Home treatment is all that is needed for most styes and chalazia.
If a stye is not getting better with home treatment, talk to your doctor. You may need a prescription for antibiotic eye ointment or eyedrops. You may need to take antibiotic pills if infection has spread to the eyelid or eye.
If a stye or chalazion gets very large, the doctor may need to pierce (lance) it so it can drain and heal. Do not try to lance it yourself.

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| EyeCare America | |
| P.O. Box 429098 | |
| San Francisco, CA 94142-9098 | |
| Phone: | 1-877-887-6327 toll-free |
| Fax: | (415) 561-8567 |
| Web Address: | www.eyecareamerica.org |
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EyeCare America is a public service program of the Foundation of the American Academy of Ophthalmology. This site aims to raise awareness about eye diseases and eye care. It has information about eye conditions, treatments, and general eye health. You can check to see if you qualify for a free eye exam. |
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| National Eye Institute, National Institutes of Health | |
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| 31 Center Drive MSC 2510 | |
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| Phone: | (301) 496-5248 |
| Email: | 2020@nei.nih.gov |
| Web Address: | www.nei.nih.gov |
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As part of the U.S. National Institutes of Health, the National Eye Institute provides information on eye diseases and vision research. Publications are available to the public at no charge. The Web site includes links to various information resources. |
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Other Works Consulted
- Dambro MR (2006). Hordeolum (stye). In Griffith's 5-Minute Clinical Consult, p. 520. Philadelphia: Lippincott Williams and Wilkins.
- Neff AG, Carter CD (2009). Inflammatory lesions section of Benign eyelid lesions. In M Yanoff, JS Duker, eds., Ophthalmology, 3rd ed., pp. 1431–1432. Edinburgh: Mosby Elsevier.
- Sullivan JH (2008). Lids, lacrimal apparatus, and tears. In P Riordan-Eva, JP Whitcher, eds., Vaughan and Asbury's General Ophthalmology, 17th ed., pp. 79–97. New York: McGraw-Hill.
- Trobe JD (2006). The red eye. Physician's Guide to Eye Care, 3rd ed., chap. 4, pp. 47–51. San Francisco: American Academy of Ophthalmology.
- Weinberg RS (2007). Diseases of the eyelid, conjunctiva, and anterior segment of the eye. In LR Barker et al., eds., Principles of Ambulatory Medicine, 7th ed., pp. 1816–1829. Philadelphia: Lippincott Williams and Wilkins.
- Wright KW (2003). Pediatric "pink eye". In Pediatric Ophthalmology for Primary Care, pp. 167–196. Denver: American Academy of Pediatrics.
| By | Healthwise Staff |
|---|---|
| Primary Medical Reviewer | Kathleen Romito, MD - Family Medicine |
| Specialist Medical Reviewer | Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology |
| Last Revised | April 14, 2011 |
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ReferencesLast Revised: April 14, 2011
Author: Healthwise Staff
Medical Review: Kathleen Romito, MD - Family Medicine & Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology
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