Viral Conjunctivitis
A contagious viral cause of pink eye
Quick Facts
- Type: Eye infection
- Cause: Viruses (often the common cold virus)
- Key feature: Very contagious, watery discharge
- Main care: Supportive care; usually clears on its own
Overview
Viral conjunctivitis is an infection of the conjunctiva, the thin, clear membrane that covers the white part of the eye and lines the inside of the eyelids. When this membrane becomes infected and inflamed, the eye looks pink or red, which is why conjunctivitis is commonly called pink eye.
It is most often caused by the same viruses that cause the common cold and is very contagious, spreading easily through touch and contaminated surfaces. Viral conjunctivitis usually causes a watery discharge and often affects one eye before spreading to the other. While uncomfortable and inconvenient, it is typically mild and clears on its own within one to two weeks. It differs from bacterial conjunctivitis, which tends to cause thicker, yellow-green discharge.
Because viral conjunctivitis spreads so easily, an outbreak can move quickly through families, classrooms, and workplaces. Simple habits like frequent hand washing and not sharing towels or pillows make a big difference in limiting its spread, both to other people and to your own unaffected eye.
Symptoms
- Redness or a pink appearance in the white of the eye
- Watery, clear discharge
- A gritty or burning feeling, as if something is in the eye
- Itching or irritation
- Watery eyes and sensitivity to light
- Swollen eyelids and sometimes a swollen lymph node in front of the ear
- Often starts in one eye and spreads to the other
It frequently accompanies cold symptoms such as a runny nose or sore throat. Severe eye pain, marked vision changes, or intense light sensitivity are not typical and need prompt evaluation.
Causes
Viral conjunctivitis is caused by viruses that infect the conjunctiva.
- Adenoviruses: The most common cause, also responsible for many colds and sore throats.
- Other viruses: Including those that cause colds and, less commonly, herpes viruses, which can be more serious.
The virus spreads through contact with infected eye secretions, contaminated hands, towels, or surfaces, and through respiratory droplets. This is why it can spread quickly within households, schools, and workplaces.
Risk Factors
- Recent or current cold or upper respiratory infection
- Close contact with someone who has pink eye
- Touching the eyes with unwashed hands
- Sharing towels, pillows, or eye makeup
- Crowded settings such as schools and childcare
Diagnosis
A doctor can usually diagnose viral conjunctivitis from the symptoms and an eye examination:
- Eye examination: Looking at the type of redness and discharge, which helps tell viral from bacterial or allergic conjunctivitis.
- History: Recent cold symptoms or contact with someone who had pink eye supports a viral cause.
- Swab testing: Rarely needed, but may be used in severe, persistent, or unclear cases.
Treatment
Most viral conjunctivitis clears on its own, so treatment focuses on comfort while the infection runs its course.
- Supportive care: Cool or warm compresses and artificial tear drops to ease irritation.
- Eye hygiene: Gently cleaning away discharge with a clean, damp cloth.
- Avoiding contact lenses: Until the eye is fully healed.
- Preventing spread: Frequent hand washing and not sharing personal items.
Antibiotics do not help viral conjunctivitis because it is not caused by bacteria. If symptoms are severe, vision is affected, or herpes infection is suspected, a doctor may prescribe specific treatment.
It can take one to two weeks for symptoms to fully settle, and they may briefly seem to worsen in the first few days before improving. During this time, gentle cleaning of discharge and cool compresses help keep you comfortable while the infection runs its course.
Prevention
- Wash your hands often and avoid touching your eyes
- Do not share towels, washcloths, pillows, or eye makeup
- Disinfect surfaces and replace eye makeup used during infection
- Stay home from school or work while highly contagious, as advised
- Avoid close contact and wash bedding and towels frequently
When to See a Doctor
Most cases improve on their own, but see a doctor if symptoms are severe or do not improve. Seek prompt eye care if you have:
- Significant eye pain
- Blurred vision or other vision changes
- Intense sensitivity to light
- Symptoms in a newborn, or if you have a weakened immune system
- Redness that worsens or does not improve after one to two weeks
Frequently Asked Questions
How is viral pink eye different from bacterial pink eye?
Viral conjunctivitis usually causes watery discharge and often comes with cold symptoms, while bacterial conjunctivitis tends to cause thicker, yellow-green discharge. A doctor can tell them apart, which matters because antibiotics help only the bacterial type.
How long is viral conjunctivitis contagious?
It can be contagious for as long as the eye is red and watering, often up to one to two weeks. Frequent hand washing and not sharing personal items help prevent spreading it to others or to your other eye.
Do antibiotics help viral conjunctivitis?
No. Antibiotics treat bacteria, not viruses, so they do not help viral conjunctivitis. Treatment focuses on comfort measures like cool compresses and artificial tears while the infection clears on its own.
How can I avoid spreading pink eye?
Wash your hands often, avoid touching your eyes, and do not share towels, pillows, or eye makeup. Clean surfaces, replace makeup used during infection, and stay home while you are most contagious if advised.
When should I see a doctor for pink eye?
See a doctor if you have significant eye pain, blurred or changed vision, intense light sensitivity, or symptoms that worsen or do not improve in one to two weeks. Newborns and people with weakened immune systems should be seen promptly.
References
- Centers for Disease Control and Prevention (CDC). Conjunctivitis (Pink Eye).
- American Academy of Ophthalmology. Conjunctivitis: What Is Pink Eye?
- Mayo Clinic. Pink eye (conjunctivitis).
- MedlinePlus, U.S. National Library of Medicine. Pink eye.