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What causes Chalazion and Styes?

• Chalazion forms when an oil gland in the eyelid becomes blocked from blepharitis (eye dandruff).
• Styes are caused by bacterial infections. Usually, the bacteria grows at the root of the eyelash.

What is the difference between chalazion and stye?

Stye and chalazion are eyelid bumps that may occur at any age.

A chalazion is noticed as a bump on the eyelid. It is painless.

A stye is painful and mostly forms at the edge of the eyelid. There may be associated swelling of the eyelid.

An internal stye (hordeolum) is an inflamed and infected oil gland on the inner edge of your eyelid. Symptoms include eyelid pain, tenderness and swelling. Your eye may also tear up a lot. Treatment starts with home remedies like using a warm compress. If the stye doesn’t go away in about a week, you may need a minor procedure to drain the stye.

When you have an internal stye, an oil gland swells up and forms an abscess (pocket of pus). This leads to pain and other symptoms. While the stye may go away on its own, some people need a minor procedure to drain the pus and clear the inflammation.

Primary care providers often see and diagnose styes. Your provider may refer you to an ophthalmologist or optometrist if your stye isn’t going away or is getting worse.

What is the difference between an external stye and an internal stye?

The main difference is where they’re located on your eyelid. An external stye forms on the outer edge of your eyelid. It faces outward and looks a bit like a small pimple. An internal stye develops on the inner side of your eyelid. It faces inward, toward your eyeball. An internal stye looks like a small bump, and it may be yellowish or white.

Internal styes are usually more painful and last longer than external styes.

Reference:

• my.clevelandclinic.org/health/diseases/24478-internal-stye
• rehmansiddiqui.com/stye-and-chalazion