A stye is one of the most common reasons people come to my clinic worried that something has gone badly wrong with their eye. In almost every case it has not. A stye, or hordeolum, is a small, contained infection of one of the tiny glands along the eyelid margin, and most settle on their own. Here I explain why a stye in the eye happens, how internal and external styes differ, what genuinely helps at home, how to tell a chalazion from a stye, and which swollen eyelids need same-day care.
Along the edge of the eyelid sit small oil and sweat glands at the base of the lashes, and on the inner surface the meibomian glands that make the oily layer of the tear film. A stye develops when one gland opening blocks, secretion cannot drain, and bacteria that normally live on the skin multiply in the trapped material. The result is a small, walled-off abscess, not a tumour and not a permanent lump.
It begins as a red, tender bump on the lid margin, and within a few days a yellowish head may appear at its tip. Most people get at least one stye in their lifetime; a single episode does not mean your eyes are unhealthy.
Patients often tell me they “caught a chill” or “stood in the wind”. Cold air does not cause a stye. What matters is anything that blocks the gland openings:
Poorly controlled diabetes makes styes more frequent and more stubborn. When someone tells me they get several a year, I ask for blood glucose to be checked.
The picture develops over a few hours: redness and swelling gathered at one single point on the lid margin, pain on touching, a gritty feeling as though something is in the eye, light sensitivity and watering. A yellow head often appears after two or three days.
That detail about one point matters. If the whole lid balloons, if redness spreads onto the cheek or brow, if there is fever, or if moving the eye hurts, this is no longer a simple stye.
An external stye arises from a gland at the lash root and looks like a small spot right at the lash line. It is usually more painful but comes to a head quickly and often drains by itself.
An internal stye comes from a meibomian gland on the inner surface of the lid. From the outside you see only general swelling; the actual focus appears when I evert the lid. Because it is deeper it takes longer to settle and may leave a firm lump behind. That lump is a chalazion, one of the eyelid diseases I see most often. I put it simply: an external stye is noisy and short, an internal stye is quiet and long.
Most styes resolve without treatment. Pain and swelling peak over the first two days, the bump comes to a head between day three and five, then either drains or slowly shrinks. External styes typically settle within seven to ten days; internal ones can take two to three weeks.
Warm compresses shorten this because they soften the trapped secretion so it can drain. A swelling that is still there after two weeks, or that returns to the same spot every month, is not something I would keep waiting on.
Warm compresses are the one thing that reliably helps. Soak a clean cloth in water that is warm but not scalding, wring it out, hold it on the closed eye, and refresh it as it cools. Three or four times a day, ten to fifteen minutes each time, followed by gentle massage along the lid margin in the direction of the lashes. If there is crusting at the lash roots, daily lid hygiene also lowers the chance of the next one.
What not to do:
These two get confused constantly, and they are managed differently. A stye is acute and inflamed: red, warm, painful. A chalazion is chronic and not infected: a firm, round, usually painless nodule you can feel in the lid. A chalazion often forms after an internal stye, when the blocked gland walls itself off.
My rule of thumb: if it hurts to touch and looks red, it is a stye; if it is painless and has been the same firm lump for weeks, it is a chalazion. Chalazia also start with warm compresses, but one that persists or grows enough to blur vision may need a small drainage procedure.
One caution. In older patients, a swelling that keeps returning to the same place, causes lash loss or distorts the lid margin is not always a stye. Eyelid tumours must be ruled out, which means examination and sometimes a biopsy.
A straightforward stye does not need an urgent appointment. These do:
The first four point towards preseptal or orbital cellulitis. When infection around the lid spreads back into the orbit it threatens vision and needs to be assessed the same day. In children it can progress faster than in adults, so a swollen lid with a fever should not wait until morning; I have set out the warning signs in eyelid infections in children.
Most external styes settle within seven to ten days. Internal styes sit deeper and can take two to three weeks. Warm compresses several times a day shorten this. A swelling still present after two weeks should be examined.
A stye itself does not pass from person to person. The bacteria inside it can be transferred by hand to the other eye, so avoid sharing towels and wash your hands before touching your eyes. That is enough of a precaution.
Warm compresses for ten to fifteen minutes, three or four times a day, followed by gentle massage along the lid margin. Daily lid hygiene helps if there is crusting. Nothing else at home reliably helps.
No. Squeezing pushes infection out of the gland into the surrounding lid tissue and can turn a minor problem into a much harder one. When the bump is ready it usually drains by itself; if it does not, a doctor can do it under sterile conditions.
Recurrent styes usually sit on a background of blepharitis or meibomian gland dysfunction. While the lid margin stays chronically inflamed, the glands keep blocking. Regular lid hygiene breaks that cycle.
Pause both until the inflammation settles. Makeup blocks the gland openings further and a lens increases friction under an irritated lid. Replace the mascara and eyeliner you used during that period.
When the whole lid is swollen, redness spreads onto the cheek or brow, there is fever, eye movement hurts, or vision changes. These suggest infection spreading around or behind the eye and need same-day assessment, especially in children.
Most external styes settle within seven to ten days. Internal styes sit deeper and can take two to three weeks. Warm compresses several times a day shorten this. A swelling still present after two weeks should be examined.
A stye itself does not pass from person to person. The bacteria inside it can be transferred by hand to the other eye, so avoid sharing towels and wash your hands before touching your eyes. That is enough of a precaution.
Warm compresses for ten to fifteen minutes, three or four times a day, followed by gentle massage along the lid margin. Daily lid hygiene helps if there is crusting. Nothing else at home reliably helps.
No. Squeezing pushes infection out of the gland into the surrounding lid tissue and can turn a minor problem into a much harder one. When the bump is ready it usually drains by itself; if it does not, a doctor can do it under sterile conditions.
Recurrent styes usually sit on a background of blepharitis or meibomian gland dysfunction. While the lid margin stays chronically inflamed, the glands keep blocking. Regular lid hygiene breaks that cycle.
Pause both until the inflammation settles. Makeup blocks the gland openings further and a lens increases friction under an irritated lid. Replace the mascara and eyeliner you used during that period.
When the whole lid is swollen, redness spreads onto the cheek or brow, there is fever, eye movement hurts, or vision changes. These suggest infection spreading around or behind the eye and need same-day assessment, especially in children.
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