A stye is not contagious. Unlike pink eye, which spreads easily between people through touch, shared objects, and even airborne droplets, a stye is a localized infection confined to your eyelid. You can’t catch a stye from someone else, and you can’t give yours to another person.
Why Pink Eye Spreads and Styes Don’t
The difference comes down to where each infection lives and what causes it. Pink eye is an inflammation of the conjunctiva, the thin tissue lining the inside of your eyelid and covering the white of your eye. Viral pink eye, the most common type, is caused by the same viruses behind the common cold. It spreads through close personal contact, touching contaminated surfaces, and even respiratory droplets from a cough or sneeze. It’s highly contagious and often jumps from one eye to the other within days.
A stye, by contrast, forms when an oil gland in your eyelid gets blocked and infected. About 90 to 95 percent of styes are caused by Staphylococcus aureus, a bacterium that already lives on most people’s skin. The infection stays contained in that single blocked gland, forming what is essentially a small abscess near your lash line. Because the problem is a plugged gland rather than a surface infection, there’s no real mechanism for it to transfer to someone else. The American Academy of Ophthalmology classifies styes as a local infection, not a communicable one.
Telling Them Apart
Styes and pink eye look and feel quite different once you know what to check for. A stye appears as a small, tender bump on or near your lash line, resembling a pimple. It usually affects one eyelid, and the pain is concentrated in that spot. Pink eye causes widespread redness across the white of your eye, often with a watery or sticky discharge, itching, and a gritty feeling. Pink eye tends to start in one eye and spread to the other, while a stye stays put.
There’s also a third possibility worth knowing about: a chalazion. These look similar to styes but sit farther back on the eyelid, away from the lash line. Chalazia are caused by a blocked oil gland without active infection, so they’re less painful than styes. They’re also slower to resolve, sometimes lasting months compared to the one to two weeks typical for a stye.
How Styes Heal
Most styes resolve on their own within about a week. The gland drains, the swelling goes down, and the bump disappears without any specific medical treatment. You can speed things along with warm compresses: soak a clean washcloth in warm water, wring it out, and hold it gently against the affected eye for five minutes several times a day. The warmth helps soften the blocked oil and encourages the gland to drain naturally. Use a fresh washcloth each time, especially once the stye starts draining.
While the stye is active, avoid wearing contact lenses or eye makeup. Don’t squeeze or pop it. Squeezing can push the infection deeper into the eyelid tissue, potentially turning a minor problem into a more serious one.
Preventing Styes From Coming Back
Since styes come from blocked, infected oil glands rather than person-to-person spread, prevention is mostly about keeping those glands clean and free of debris. A few habits make a real difference:
- Remove eye makeup before bed. Leftover mascara and eyeliner can clog the glands along your lash line overnight.
- Replace mascara every six months. Bacteria grow in makeup over time, and mascara wands repeatedly contact the area where styes form.
- Avoid rubbing your eyes. This introduces bacteria from your hands directly to your eyelid glands.
- Wash your eyelids regularly if you get styes often. A small amount of baby shampoo mixed in warm water, gently wiped along the lash line, helps keep the oil glands clear.
When a Stye Needs Medical Attention
A stye that hasn’t improved after a few weeks, or one that’s getting noticeably worse, may need professional treatment. In rare cases, the infection can spread beyond the eyelid into the surrounding tissue, a condition called orbital cellulitis. Warning signs include redness and swelling that extends beyond the eyelid, a bulging eye, pain when moving the eye, fever, or any change in vision. In children, a high fever combined with eye swelling warrants an emergency room visit. These complications are uncommon, but they can cause lasting damage to vision if left untreated.
A stye that doesn’t drain on its own may also harden into a chalazion. If a firm, painless bump remains after the initial tenderness fades, an eye care provider can evaluate whether it needs to be drained.