A stye looks like a small, red, pimple-like bump on the edge of your eyelid, usually right at the base of your eyelashes. It’s tender to the touch, warm, and swollen, and it may develop a visible white or yellowish head as it fills with pus. Most styes are easy to spot, but the exact appearance depends on the type and how far along it is.
External vs. Internal Styes
External styes are the more common and recognizable type. They form on the outer edge of your eyelid, right where your lashes grow. An external stye looks like a small pimple: a red, swollen bump that comes to a point. As it matures, you may see a whitish or yellow center, similar to a whitehead. When an external stye drains, the pus comes out along the lash line.
Internal styes develop on the inner surface of your eyelid, facing toward your eyeball. Because of their position, they’re harder to see without pulling your eyelid away from your eye. An internal stye appears as a small bump that may look yellowish or white against the pink tissue inside the lid. You’ll usually notice internal styes more by feel than by sight: a deep, aching pressure in the eyelid that’s worse when you blink. When internal styes drain, the discharge comes out on the inner conjunctival surface rather than along the lash line.
How a Stye Changes Over Time
A stye doesn’t appear fully formed. In the earliest stage, you’ll notice a small area of redness and tenderness along your eyelid margin, often centered on a single eyelash follicle. At this point, it might just look like a slightly swollen, irritated spot. Over the next day or two, a distinct bump forms. The surrounding eyelid tissue can swell enough to partially close the eye, and at this stage the whole lid may look puffy and red, making it hard to even feel a distinct lump underneath.
As the stye matures, a visible head of pus often develops at the center of the bump. This is the stage most people picture when they think of a stye. Eventually, the bump either drains on its own or gradually reabsorbs. Most styes resolve within one to two weeks without treatment, though warm compresses can speed the process.
Surrounding Symptoms You Can See
The bump itself isn’t the only visible change. Styes commonly cause noticeable swelling across a larger area of the eyelid, sometimes enough to make the eye look partially shut. You might also see crusting along your lash line, especially after sleeping, from dried discharge. Watery eyes and a gritty sensation are common but won’t change the visible appearance much. In some cases, the redness and swelling extend beyond the immediate bump, giving the entire lid a puffy, inflamed look.
Styes can appear on the upper or lower eyelid, and occasionally on both eyelids at once or in more than one spot on the same lid.
Stye vs. Chalazion
The bump people most often confuse with a stye is a chalazion. They look similar at first glance, but there are key differences. A stye is red, sore, and sits right at the eyelid’s edge near the lashes. A chalazion typically develops farther back on the eyelid, away from the lash line. The biggest giveaway is pain: a stye hurts, sometimes significantly, while a chalazion is usually painless. Chalazia also tend to be firmer and rounder, more like a hard pea under the skin than a pimple. A stye that doesn’t drain can eventually become a chalazion as the acute infection fades but the blocked gland remains swollen.
When a Stye Looks More Serious
A typical stye stays localized to one small area. If you notice the redness and swelling spreading across the entire eyelid or onto the skin around your eye, this can signal a secondary skin infection called preseptal cellulitis. The eyelid will look uniformly red, swollen, and feel warm across a much larger area than a normal stye would affect.
More concerning signs include swelling so severe you can’t open the eye, double vision, pain when moving the eye in different directions, a bulging appearance to the eyeball, or fever. These symptoms suggest the infection may have spread deeper into the eye socket, which requires urgent medical attention. A straightforward stye, by comparison, stays put as a single tender bump that gradually shrinks on its own.