An eye stye (medical name: hordeolum) is a small, painful bump on the eyelid caused by a bacterial infection in an oil gland or hair follicle. Styes are extremely common, typically harmless, and usually resolve on their own within one to two weeks. They look and feel a lot like a pimple, and in most cases, that’s about how serious they are.
What Causes a Stye
Your eyelids contain dozens of tiny oil glands that help lubricate your eyes. When one of these glands gets clogged, bacteria (most often Staphylococcus aureus, the same germ behind many skin infections) can multiply inside the blocked gland and trigger an infection. The result is a red, swollen, tender bump.
There are two types. An external stye forms at the base of an eyelash, in the smaller oil glands along the eyelid’s edge. This is the more common kind. An internal stye develops deeper in the eyelid, inside one of the larger oil glands (called meibomian glands) that produce the oily layer of your tear film. Internal styes tend to be more painful and harder to treat because the infection sits deeper in the tissue.
Risk Factors for Getting Styes
Some people get styes once and never again. Others deal with them repeatedly. Recurring styes are often tied to chronic eyelid inflammation (blepharitis), which keeps the oil glands partially clogged and prone to infection. Skin conditions like rosacea, acne, and seborrheic dermatitis also increase your risk.
Other common triggers include touching your eyes with unwashed hands, sleeping in eye makeup, and using old cosmetics. Bacteria accumulate in mascara tubes and eyeliner pencils over time. Replacing eye makeup every three to four months significantly reduces contamination risk.
What a Stye Feels and Looks Like
A stye typically starts with tenderness and slight swelling at the eyelid’s edge. Within a day or so, a visible red bump forms, often with a small white or yellow point at the center where pus is collecting. The eyelid may feel heavy or puffy, and your eye might water more than usual. Some people notice sensitivity to light or a gritty sensation, as though something is in the eye.
Most styes come to a head and rupture on their own within two to four days, releasing pus and relieving the pain fairly quickly after that. The remaining swelling and redness can take another week or so to fully clear. In cases with more significant inflammation, you might develop a mild fever or chills, though this is uncommon.
Stye vs. Chalazion
A chalazion is the bump that gets confused with a stye most often. In the earliest stages, the two look identical: red, swollen, painful. The difference becomes clear over a few days. A stye stays painful and stays at the eyelid margin. A chalazion gradually becomes painless and settles into a firm, round nodule closer to the center of the eyelid.
The underlying cause is different, too. A stye is an active bacterial infection. A chalazion is a blocked oil gland without infection, where trapped oils irritate the surrounding tissue and cause a slow inflammatory reaction. Chalazions take longer to resolve, typically two to eight weeks, and sometimes a stye that clears its infection will leave behind a chalazion.
How to Treat a Stye at Home
Warm compresses are the main treatment. Soak a clean washcloth in warm water, wring it out, and hold it gently against the closed eyelid for 10 to 15 minutes. Repeat this three to four times a day. The heat loosens the clogged oils and encourages the stye to drain naturally. You can rewarm the cloth as it cools to keep consistent warmth on the area.
Beyond compresses, keep the area clean and resist the urge to squeeze or pop the stye. Squeezing can push the infection deeper into the eyelid or spread bacteria to surrounding tissue. Avoid wearing contact lenses and eye makeup until the stye has fully healed. If you were using mascara or eyeliner before the stye appeared, discard it, as the product may be harboring the bacteria that caused the infection.
When a Stye Needs Medical Treatment
Most styes don’t need a doctor’s visit. But if warm compresses haven’t made a difference after a week or two, or if the bump is getting worse instead of better, it’s worth being seen. An eye doctor may prescribe a topical antibiotic ointment or, for external styes, a combination antibiotic and steroid to reduce swelling.
Internal styes are a different story. Because the infection sits deeper in the eyelid, topical treatments often can’t penetrate the tissue effectively. Many eye doctors will prescribe oral antibiotics early for internal styes rather than waiting for topical therapy to fail. This approach helps prevent the infection from spreading or turning into a persistent chalazion.
If a stye or chalazion persists for more than one to two months despite treatment, a minor in-office procedure to drain it may be recommended. The doctor numbs the area, makes a small incision on the inner surface of the eyelid, and drains the contents. Recovery is quick, and the procedure usually leaves no visible scar since the cut is made on the inside of the lid.
Complications to Watch For
Serious complications from styes are rare, but the one to know about is preseptal cellulitis, a bacterial infection that spreads beyond the stye into the surrounding eyelid tissue. The signs are hard to miss: the entire eyelid becomes swollen, warm, red, and tender, sometimes so puffy that you can’t open it easily. A fever may develop.
The key reassurance with preseptal cellulitis is that once someone manages to open the swollen eyelid, vision and eye movement are normal and the eyeball itself isn’t bulging. This distinguishes it from orbital cellulitis, a deeper and more dangerous infection behind the eye. Preseptal cellulitis requires prompt treatment with oral antibiotics but responds well when caught early.
Preventing Styes
Good eyelid hygiene is the most effective prevention. Wash your hands before touching your face or eyes. Remove all eye makeup before bed, and clean along the lash line with a gentle cleanser or diluted baby shampoo. Replace mascara, eyeliner, and eyeshadow every three to four months, and never share eye cosmetics.
If you have blepharitis or rosacea, managing the underlying condition makes a real difference in stye frequency. Daily warm compresses (even when you don’t have a stye) help keep the oil glands flowing and reduce the buildup that leads to blockages. Your eye doctor can recommend a lid hygiene routine tailored to your situation if styes keep coming back.