That crusty, sticky stuff you find in the corners of your eyes, especially when you wake up, is called rheum. It’s a completely normal byproduct of your eyes cleaning themselves while you sleep. During the day, blinking washes away the mixture of mucus, oils, and dead skin cells that your eyes constantly produce. At night, with no blinking to clear things out, that mixture collects and dries into the familiar goop at the corners of your eyelids.
What Eye Goop Is Made Of
Your eyes produce a thin film of tears, oils, and mucus all day long to stay lubricated and protected. The mucus comes primarily from the conjunctiva, the clear membrane covering the white of your eye, and from the cornea itself. Oil glands along the edges of your eyelids (called meibomian glands) add a layer of oil that keeps tears from evaporating too quickly. Dust, pollen, dead skin cells, and tiny debris get trapped in this mixture throughout the day.
When you’re awake, every blink sweeps this mixture toward the inner corner of your eye and down into your tear ducts, which drain into your nose. When you sleep, everything pools and dries. The result is that familiar crust or sticky blob you wipe away each morning. A small amount of clear or whitish goop is perfectly healthy.
When the Color or Amount Changes
Normal morning eye goop is small in quantity and whitish or slightly yellow once dried. If the amount suddenly increases or the color shifts, your eyes are usually reacting to an irritant or infection. The color and texture of the discharge are strong clues to what’s going on.
- Watery and clear: Typically a viral infection (like the most common form of pink eye), allergies, or dry eye. Viral conjunctivitis often produces watery discharge during the day with some stickiness in the morning.
- Yellow or green and sticky: Usually a bacterial infection. Bacterial conjunctivitis produces a thick, colored discharge throughout the day and often glues both eyelids shut overnight. That “glued eyes upon awakening” pattern is one of the strongest signs of a bacterial cause.
- Stringy or ropy: Common with allergic conjunctivitis, often accompanied by intense itching.
- Crusty flakes along the lash line: Often points to blepharitis (eyelid inflammation) or a problem with the oil glands in your eyelids.
Bacterial conjunctivitis is extremely common, affecting roughly 135 out of every 10,000 people in the U.S. each year. If you start antibiotic eye drops and don’t notice improvement within 24 hours, that’s worth a follow-up with your provider.
Blocked Oil Glands and Dry Eyes
Sometimes increased eye goop isn’t caused by an infection at all. The oil glands along your eyelid margins can become clogged, a condition called meibomian gland dysfunction. When these glands can’t release enough oil, or the oil they produce is thick and waxy instead of fluid, your tear film breaks down faster. This leads to dry, irritated eyes and sticky or crusty residue on your eyelids.
Dry eye itself can paradoxically make your eyes water more. When the surface of your eye dries out, it triggers a reflex that floods the eye with watery tears. These emergency tears lack the balanced oil-and-mucus composition of normal tears, so they don’t stick around or protect the surface well. You end up with intermittent excessive watering, irritation, and more goop than usual.
Eye Goop in Babies
If your infant has persistent goop in one or both eyes, a blocked tear duct is the most likely cause. Many babies are born with a tear duct that hasn’t fully opened yet. The signs are straightforward: more tearing than usual even when the baby isn’t crying, dried crusting on the eyelashes, and mild redness from rubbing.
A blocked tear duct on its own isn’t an infection, but it can become one. If the discharge turns yellow or green, the eyelid swells, or the redness intensifies, bacteria have likely started growing inside the blocked duct. That shift from clear crusting to colored, thick discharge is the key distinction.
How to Clean Your Eyes Safely
The American Academy of Ophthalmology recommends resisting the urge to rub your eyes with your fingers when you wake up. Instead, soak a clean washcloth in warm (not hot) water and lay it over your closed eyelids. Gently rub to soften and remove the crust. Always wash your hands before and after touching your eyes.
If you have an infection in one eye, use a separate clean washcloth for each eye so you don’t spread it from one side to the other. For people with blepharitis or clogged oil glands, a warm compress held against the eyelids for several minutes can help soften hardened oil and open blocked glands.
Signs That Need Prompt Attention
Most eye goop is harmless or tied to a minor, treatable condition. A few situations call for faster action. Heavy, green or yellow discharge that keeps returning throughout the day, especially with significant redness and swollen eyelids, suggests a bacterial infection that may need prescription drops. Copious, rapidly worsening discharge can signal a more aggressive bacterial strain that needs same-day evaluation.
Sudden changes in vision, even partial, are a medical emergency regardless of whether you also have eye pain. The same applies if light suddenly becomes painful to look at, you see new floaters, or you experience intense eye pain alongside discharge. These symptoms can point to conditions affecting the cornea or deeper structures of the eye, not just the surface.