Chalazion vs stye: how to tell the difference

That lump on your eyelid is almost certainly one of two things — and in the chalazion vs stye question, the fastest clue is pain. A stye is an infection, so it usually hurts. A chalazion is a blocked oil gland, so it is usually painless. Both are common, both are rarely dangerous, and both often settle with simple care at home. Here is how to tell them apart and what to do for each.

What is a chalazion?

A chalazion is a small, usually painless lump that forms inside the eyelid when a meibomian oil gland becomes blocked.

Meibomian glands line both the upper and lower eyelids and release an oil that keeps tears from evaporating. When one is blocked, the oil backs up inside the gland and the surrounding tissue becomes chronically inflamed. The result is a firm, rounded bump deep in the lid that grows gradually over weeks. A chalazion can develop on its own or appear after a stye has healed. For more detail, see our guide to chalazia and our general overview of eyelid bumps.

What is a stye?

A stye — the medical term is hordeolum — is a red, tender bump caused by a bacterial infection, most often at the base of an eyelash. That is called an external stye. An internal stye happens when an oil gland inside the lid becomes infected instead, and it tends to hurt more and last longer than the external kind.

Styes come up quickly, often overnight, and usually come to a head and drain on their own within days. Because they are infections near the surface of the lid margin, they look and feel more like a pimple than a deep lump. See our stye guide for a full walkthrough.

Chalazion vs stye: key differences

The two conditions are related — both involve the oil glands of the eyelid — but they differ in cause, feel, and timeline:

One practical overlap: a stye that heals can leave behind a blocked gland, which then becomes a chalazion. A bump that starts painful, then stops hurting but lingers, has likely made exactly that transition.

How to tell them apart at home

You can usually narrow it down in a few minutes in front of a mirror:

1. Rate the pain. Press very lightly on the lid. Sharp tenderness points to a stye; little or no pain points to a chalazion.
2. Check the location. Look where the lid meets the lashes. A bump right at the margin is more likely a stye; one sitting deeper in the lid, farther from the margin, fits a chalazion.
3. Look at the appearance. Red and inflamed, possibly with a white or yellow point: stye. A smooth, pale, firm lump under normal skin: chalazion.
4. Think about speed. A bump that appeared overnight suggests a stye. A lump you only noticed after it had already been growing suggests a chalazion.
5. Track what happens next. A stye should improve within a week or two. If a bump lasts beyond that and stops hurting, treat it as a probable chalazion — and see an eye doctor if it keeps growing.

Treatment options

Care starts the same way for both conditions, and most bumps never need anything beyond home care. Full detail is in chalazion treatment.

Warm compresses

Hold a clean, warm — never scalding — compress against the closed eyelid for 10 to 15 minutes, three to four times a day, as the American Academy of Ophthalmology recommends. The heat softens the trapped oil so it can drain. A reheatable eye mask or a cloth soaked in warm water both work; re-warm it as it cools.

Lid hygiene

Once the bump has softened, gently clean the lid margin with a fragrance-free lid scrub or a dilute mild cleanser once or twice a day. This keeps the gland openings clear and helps prevent the next bump.

Steroid injection

For a chalazion that persists for weeks, an ophthalmologist can inject a corticosteroid into the lump to calm the inflammation. It is a quick in-office procedure.

Incision and drainage

A chalazion that will not resolve can be drained through a small incision, usually on the inner surface of the eyelid, under local anesthesia. This is also done in the office. See chalazion removal.

Surgery

True surgical excision is uncommon. It is generally reserved for lumps that keep recurring, distort the eyelid, or look unusual enough that a tissue sample should be examined.

When to see a doctor

Home care covers most bumps, but get seen promptly for any of these:

• Vision changes or blurry vision in the affected eye
• Redness or swelling that spreads beyond the lid to the cheek or around the eye
• Fever along with the lump
• Pain out of proportion to the bump’s size, or pain that keeps worsening
• A lump that bleeds, ulcerates, or breaks through the skin
• A lump that keeps growing after a couple of weeks of compresses
• Bumps that keep returning in the same spot

Prevention

• Remove eye makeup before bed and replace products every few months
• Keep the lid margins clean if you have blepharitis — daily lid hygiene, not just during flare-ups
• Wash your hands before touching the eye area
• Avoid sharing towels or washcloths
• Manage rosacea or seborrheic dermatitis with your doctor, since both go hand in hand with lid inflammation

FAQ

Can a stye turn into a chalazion?

Yes. Once a stye’s infection settles, the gland can stay blocked and slowly form a painless chalazion. A tender bump that becomes painless but lingers is a very common story.

Is a chalazion or a stye contagious?

Neither spreads from person to person the way a cold does. The bacteria involved can travel on towels, pillowcases, and makeup, though, so do not share those items and keep washing your hands.

Do chalazions hurt to the touch?

Usually not. A chalazion is typically painless, though a large one can feel tender from pressure alone. Clear pain on touch points more toward a stye or an infected cyst.

How long does each one last?

According to the NHS, a stye usually improves within one to two weeks. The Cleveland Clinic notes that a chalazion can last several weeks to a few months, especially if the gland stays blocked.

Can I wear makeup or contacts with either?

It is safest to pause eye makeup and contact lenses until the bump has settled, and to replace eye makeup afterward. Your eye doctor can tell you when it is fine to resume lenses.

When should I stop home care and call a doctor?

If the lump has not improved after two to four weeks, affects your vision, keeps growing, or comes with spreading redness, fever, or severe pain, it is time for a professional opinion.

Sources

• American Academy of Ophthalmology — Chalazion
• American Academy of Ophthalmology — Stye
• Cleveland Clinic — Chalazion
• NHS — Stye

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