A stye (sometimes spelled “stue” or “sty”) is a small, tender red bump that forms on the edge of your eyelid when one of the tiny glands there gets infected. It looks and feels a lot like a pimple, and it’s about as common. Most styes are harmless and clear up on their own within one to two weeks.
What Causes a Stye
Your eyelids contain dozens of small oil glands that help keep your eyes lubricated. When one of these glands gets clogged, bacteria (usually staph, the same type that causes skin infections elsewhere on your body) can multiply inside the blocked gland and trigger an infection. The result is a swollen, painful bump filled with pus.
There are two types depending on which gland is affected. External styes form at the base of an eyelash, in the oil or sweat glands right along the lash line. These are the most common kind. Internal styes develop deeper in the eyelid, inside a larger oil gland called a meibomian gland. Internal styes tend to be more painful because they press against the eyeball, though both types look similar from the outside.
Several things raise your odds of getting one. Touching or rubbing your eyes with unwashed hands is the most direct route. Sleeping in old eye makeup, using expired cosmetics, or sharing eye products with others can introduce bacteria to the lash line. People with chronic eyelid inflammation (blepharitis), rosacea, or seborrheic dermatitis are more prone to recurrent styes because these conditions change the oil composition along the eyelid and make blockages more likely.
What a Stye Feels and Looks Like
The first sign is usually tenderness or a gritty sensation at one spot on the eyelid. Within a day or so, a red, swollen bump appears. Your eye may water more than usual, and the eyelid can feel puffy or heavy. Some people notice light sensitivity or a feeling like something is stuck in the eye.
As the stye matures over a few days, a small white or yellow head often forms at the center, similar to a whitehead pimple. The pain tends to peak around this stage and then gradually fades as the stye drains on its own. The whole eyelid may look mildly swollen, but the redness and tenderness stay focused around the bump itself.
How to Treat a Stye at Home
Warm compresses are the single most effective home treatment. Soak a clean washcloth in warm (not hot) 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 oil, increases blood flow, and encourages the stye to drain naturally. Many people find the stye resolves noticeably faster with consistent compress use.
Beyond compresses, keep the area clean. Wash your hands before touching your face, and gently clean the eyelid with diluted baby shampoo on a cotton swab or a pre-moistened eyelid wipe if you have one. Avoid wearing eye makeup while you have a stye, and throw away any products you used right before it appeared. If you wear contact lenses, switch to glasses until the stye heals, since lenses can trap bacteria against the irritated tissue.
One important rule: don’t squeeze or pop a stye. Forcing it open can spread the infection deeper into the eyelid or into surrounding tissue, turning a minor problem into a serious one.
Stye vs. Chalazion
A chalazion is often confused with a stye because both are bumps on the eyelid. The key difference is that a chalazion isn’t an active infection. It forms when a blocked oil gland becomes inflamed without bacteria being involved. Chalazia are typically painless, grow slowly, and sit farther from the eyelid edge than a stye. Sometimes a stye that doesn’t fully drain turns into a chalazion over time.
If your bump isn’t tender, has been there for more than a few weeks, and isn’t red or warm to the touch, it’s more likely a chalazion. Chalazia can take a month or longer to resolve and sometimes need a minor in-office procedure to drain if they don’t shrink on their own.
When a Stye Needs Medical Attention
Most styes resolve without any professional treatment. But certain signs suggest the infection may be spreading or something else is going on. See an eye care provider if the swelling spreads beyond the bump to involve most of the eyelid or the skin around the eye, if you develop a fever, or if your vision becomes blurry. A stye that hasn’t improved at all after two weeks, or one that keeps coming back in the same spot, also warrants a visit.
In rare cases, a stye can progress to a deeper skin infection called cellulitis, which causes widespread redness, warmth, and swelling across the eyelid and surrounding face. This requires prompt treatment with oral antibiotics. For stubborn styes that resist home care, a provider may drain the bump through a small incision under local anesthesia, a quick procedure done in the office.
Preventing Styes
Good eyelid hygiene goes a long way. Wash your hands before touching your eyes, replace eye makeup every three to six months, and never share mascara, eyeliner, or eye shadow with anyone. Remove all eye makeup before bed. If you’re prone to styes or have blepharitis, a nightly eyelid cleaning routine using a gentle cleanser keeps the oil glands from clogging.
Regular warm compresses, even when you don’t have a stye, can help keep the oil glands flowing freely. A few minutes of a warm cloth on your eyelids before bed is a simple habit that reduces the chance of blockages forming in the first place.