White Discharge from the Eye: What It Means

What white eye discharge is

Your eyes constantly make a tear film with three layers: oil from glands in the eyelids, watery tears, and mucus that helps tears stick to the eye. Blinking sweeps used tears, dust and dead cells toward the inner corner. Overnight, without blinking, this collects and dries into the crust often called "sleep" or rheum.

When the eye is irritated or infected, it makes more mucus and white blood cells, and discharge becomes more noticeable during the day. The color and texture give useful clues.

Causes of white discharge from the eye

Allergic conjunctivitis

Allergic conjunctivitis is a common cause of white, stringy mucus. The clue is itching, often intense, in both eyes. The whites of the eyes are pink, the lids may be puffy, and you may also be sneezing with a runny nose. It follows exposure to pollen, pet dander, dust mites or mold.

Dry eye

When the tear film is poor, the eye responds by making extra mucus. You may find white strings or flecks in the corner, along with gritty, burning, tired eyes that are worse with screen use, reading, air conditioning or wind. Dry eye is more common with age, in women after menopause, and with some medicines.

Blepharitis

Blepharitis is inflammation of the eyelid margins. The oil glands become blocked, and the lashes collect crusts or white, foamy flakes like dandruff. Eyes feel sore and gritty, especially in the morning. It is long-term but controllable with daily lid hygiene.

Viral conjunctivitis

Viral conjunctivitis usually follows or accompanies a cold. The eye is pink and watery with a small amount of white mucus, often starting in one eye and spreading to the other within days. It is very contagious and clears in 1 to 3 weeks.

Bacterial conjunctivitis

Bacterial conjunctivitis produces thicker discharge that is white, yellow or green, keeps coming back after wiping, and glues the lashes together after sleep. It is common in children. Many mild cases clear on their own in a week, but antibiotic drops speed recovery.

Blocked tear duct

In babies, a narrow or blocked tear duct (tear duct stenosis) causes a constantly watery eye with sticky white or yellow discharge, usually on one side, without much redness. Most open by age 1. In adults, a blocked duct can become infected (dacryocystitis), causing a painful swelling beside the nose.

Less common causes

• Contact lenses: overwear or poor hygiene causes mucus and irritation. A red, painful eye with lenses can be a corneal ulcer (keratitis).
• Foreign body: something in the eye triggers watering and mucus, usually in one eye only.
• Sexually transmitted infections: chlamydia and gonorrhea can cause persistent or heavy, purulent discharge.
• Mucus fishing syndrome: repeatedly pulling strands of mucus out of the eye irritates it and creates more mucus.

White discharge in the corner of the eye with no redness

If the eye is white, comfortable and vision is normal, a small amount of discharge in the corner is usually harmless. Common reasons are mild dry eye, blepharitis, or simply the normal overnight build-up. If it is thick and returns repeatedly during the day, look for itching (allergy) or crusty lid margins (blepharitis).

When to see a doctor

Get your eye checked the same day if discharge comes with eye pain, sensitivity to light, blurred vision, contact lens wear, a white spot on the cornea, or swelling around the eye. These can signal infections that threaten vision. Newborns with eye discharge also need prompt assessment.

How doctors find the cause

A primary care doctor, optometrist or ophthalmologist will ask about itching, pain, contact lenses, recent colds, allergies and how long it has lasted. They check your vision and look at the eye with a light or slit lamp microscope. Fluorescein, an orange dye, shows scratches or ulcers on the cornea. A swab of the discharge is taken only for severe, persistent or newborn cases, or when a sexually transmitted infection is suspected.

Treatment and home care

General steps

• Wipe discharge away with cotton pads soaked in cooled boiled water, from the inner corner outward, using a fresh pad for each eye.
• Wash your hands before and after touching your eyes.
• Stop wearing contact lenses until symptoms have fully settled.
• Do not share towels, pillows or eye makeup, and replace eye makeup after an infection.

By cause

• Allergy: cold compresses, avoiding the trigger, and over-the-counter antihistamine eye drops such as ketotifen. Follow the label directions.
• Dry eye: preservative-free artificial tears several times a day, regular screen breaks, and a humidifier.
• Blepharitis: warm compresses for 5 to 10 minutes, then gentle massage of the lids and cleaning the lash line once or twice daily.
• Bacterial conjunctivitis: antibiotic drops or ointment if your clinician prescribes them.
• Viral conjunctivitis: cool compresses and artificial tears. Antibiotics do not help.

Frequently asked questions

What does a white discharge from the eye mean?

White discharge is mucus. A little in the morning is normal. More than usual usually means irritation from allergy, dry eye or blepharitis. Thick white or yellow discharge that keeps returning and glues the lids together suggests bacterial conjunctivitis.

Why do I have thick white discharge in the corner of my eye sometimes?

Occasional thick white discharge in the corner usually comes from dry eye or blepharitis, where the eye makes extra mucus to compensate for a poor tear film. Itchy eyes point to allergy. Warm compresses, lid cleaning and artificial tears often help.

Is white stringy mucus in the eye a sign of infection?

Not usually. Stringy, ropy white mucus is typical of allergic conjunctivitis or dry eye. Infections tend to cause thicker discharge that is yellow or green, along with red eyes and lids stuck together in the morning.

Is white eye discharge contagious?

It depends on the cause. Discharge from viral or bacterial conjunctivitis is contagious, so wash your hands and avoid sharing towels. Discharge from allergy, dry eye or blepharitis is not contagious.

How do I get rid of white discharge in my eye?

Clean the eye with cooled boiled water, then treat the cause: antihistamine drops for allergy, artificial tears for dry eye, and warm compresses with lid cleaning for blepharitis. See a doctor if it lasts more than a week or comes with pain or blurred vision.