A stye grows bigger because the bacterial infection inside it is still actively producing inflammation and pus. During the first two to three days, increasing swelling is a normal part of the infection cycle. The bump is essentially a small abscess forming at the edge of your eyelid, and like any abscess, it builds pressure before it peaks and drains. Most styes last one to two weeks and resolve on their own, but there are specific reasons yours might be growing larger than expected.
What’s Happening Inside the Bump
A stye starts when bacteria, usually staph, infect a blocked gland or hair follicle along your eyelid. Your immune system responds by flooding the area with white blood cells, which creates the redness, warmth, and swelling you’re seeing. As the infection progresses, dead cells and bacteria accumulate into pus, forming a small yellowish head at the base of an eyelash. The surrounding tissue becomes firm and puffy, and sometimes the entire eyelid swells.
This escalation is the infection running its course. Think of it like a pimple: it gets worse before it gets better. The bump will typically reach its peak size within the first few days, then either drain on its own or slowly reabsorb. So if you’re on day one or two and the stye is getting bigger, that’s the expected trajectory.
External vs. Internal Styes
Where the stye sits on your eyelid matters. External styes form at the base of your eyelashes and are the most common type. They tend to develop a visible pus head and are usually easy to spot. Internal styes form deeper inside the eyelid, in the oil-producing glands embedded in the lid itself. Internal styes can cause more dramatic swelling because the infection is trapped deeper in tissue, and they sometimes drain inward toward the surface of the eye rather than outward.
Both types can make the entire eyelid puffy. Internal styes occasionally cause more intense inflammation, and in rare cases can trigger fever or chills.
When a Stye Becomes a Chalazion
If your stye has been around for a while and the pain has faded but the bump keeps growing, it may have turned into a chalazion. This happens when an internal stye doesn’t fully drain. Instead of resolving, the blocked gland becomes a firm, painless lump that sits farther back on the eyelid than a typical stye. A chalazion can grow slowly over weeks, and if it gets large enough, it can press against your eyeball and cause blurry vision.
The key distinction: styes hurt, chalazia usually don’t. If your bump started painful and is now just a growing, painless lump, that transition has likely occurred. Chalazia sometimes need different treatment than styes, so it’s worth having it looked at if it’s been more than a couple of weeks.
Reasons Your Stye May Be Growing Faster
Several things can fuel a stye’s growth beyond the normal inflammatory cycle:
- Touching or squeezing the bump. Pressing on a stye pushes bacteria deeper into the tissue and can spread the infection to surrounding glands. This is the most common reason a stye gets worse quickly.
- Wearing contact lenses or eye makeup. Both introduce bacteria to an already infected area and block drainage.
- Underlying eyelid inflammation (blepharitis). This chronic condition makes your eyelids prone to infection by keeping the oil glands irritated and partially blocked. If you get styes repeatedly, blepharitis is a likely contributor.
- Incomplete warm compress routine. If you’ve been applying heat inconsistently, the blocked gland may not be opening enough to drain.
How to Help It Drain
Warm compresses are the single most effective thing you can do at home. Soak a clean washcloth in warm water, wring it out, and hold it gently against the affected eye for five minutes. Repeat this several times a day. The heat softens the hardened oil or pus plugging the gland and encourages the stye to open and drain naturally. Consistency matters here. Doing it once in the morning won’t accomplish much. Four to six times daily is a more effective pace.
Keep your hands away from the bump between compresses. Don’t try to pop it. Wash your eyelids gently if you have crusty debris along the lash line, and skip eye makeup and contacts until the stye resolves.
Signs the Infection Is Spreading
A stye that continues getting bigger after two to three days, or one that becomes more painful rather than less, has moved past the normal growth window. At that point, the infection may need antibiotics or professional drainage.
More concerning is when the swelling spreads beyond the bump itself. Preseptal cellulitis is a skin infection that can develop when bacteria from a stye spread into the surrounding eyelid tissue. The hallmarks are widespread redness, warmth, and tenderness across the entire eyelid, sometimes with fever. With preseptal cellulitis, once you open the swollen lid, the eye itself looks normal: white, no bulging, and vision is intact.
If the swelling involves pain when moving your eye, the eye itself appears to be pushed forward, or your vision decreases, the infection may have moved deeper into the eye socket. This is a medical emergency and requires immediate evaluation.
When Professional Treatment Helps
If your stye hasn’t started improving within two days, or if it’s actively getting more painful, it’s reasonable to have it evaluated. Treatment options at that stage are straightforward. Antibiotic eye drops or a topical ointment can help clear the infection when warm compresses alone aren’t enough. If the infection spreads beyond the eyelid, oral antibiotics may be necessary. For styes that refuse to drain, a doctor can make a small incision to release the trapped pus, which provides almost immediate relief.
If you get styes frequently, the underlying issue is likely chronic eyelid inflammation or a skin condition that keeps your oil glands prone to blockage. Treating that root cause with daily eyelid hygiene, and sometimes prescription drops, can break the cycle.