Baby Pink Eye (Conjunctivitis)
The short answer
Pink eye (conjunctivitis) is an inflammation of the clear membrane covering the white of the eye and the inner eyelids. In babies it can be caused by viruses, bacteria, allergens, or irritants. Bacterial pink eye causes thick yellow-green discharge and is treated with antibiotic eye drops. Viral pink eye causes watery discharge and resolves on its own. In newborns under 28 days, pink eye can be more serious and always requires medical evaluation.
By Age
What to expect by age
Conjunctivitis in the first 28 days of life (ophthalmia neonatorum) is a medical concern that requires prompt evaluation. It can be caused by the antibiotic ointment given at birth (chemical conjunctivitis, appears in the first 24 hours), blocked tear ducts, or infections acquired during birth including chlamydia and gonorrhea. Gonococcal conjunctivitis is a medical emergency that can rapidly damage the eye. Any eye discharge in a newborn should be reported to your pediatrician promptly.
The most common cause of watery or goopy eyes at this age is a blocked tear duct, not pink eye. Blocked tear ducts cause persistent watering and mild crusting, usually in one eye, without redness of the white of the eye. True pink eye causes redness of the whites, swollen eyelids, and discharge. If your baby has a blocked tear duct, gentle massage of the tear duct area and keeping the eye clean with warm water is usually sufficient. Most blocked tear ducts resolve by 12 months.
Pink eye in older babies is commonly viral (associated with a cold) or bacterial. Viral pink eye causes clear, watery discharge and often affects both eyes. Bacterial pink eye causes thick, yellow-green discharge that crusts the eyelids shut, often starting in one eye and spreading to the other. Bacterial pink eye usually responds quickly to antibiotic eye drops or ointment. Clean discharge from the eyes with a warm, wet cloth before applying drops.
Toddlers in daycare frequently get pink eye because it is highly contagious. They touch everything and then rub their eyes. Prevention includes good handwashing. Most daycares require 24 hours of antibiotic treatment before the child can return. Allergic conjunctivitis can also appear in toddlers and causes itchy, watery eyes without thick discharge, often with associated sneezing. If pink eye keeps recurring, talk to your pediatrician about possible allergies or persistent bacteria.
What Should You Do?
When to take action
- Mild clear eye discharge during a cold that resolves as the cold improves
- A blocked tear duct causing watering and mild crusting in one eye without redness
- Brief eye redness after swimming, rubbing, or exposure to wind that clears quickly
- Your baby has red eyes with thick yellow-green discharge suggesting bacterial pink eye
- Eye symptoms are not improving after 2-3 days of prescribed antibiotic drops
- Your baby has recurring episodes of pink eye and you suspect allergies
- Your baby has a blocked tear duct that has not resolved by 12 months
- Your newborn (under 28 days) has any eye discharge, swelling, or redness - this needs same-day evaluation
- Your baby's eye is very swollen, has severe redness, or they cannot open the eye
- There is a blister on or near the eyelid, the skin around the eye is red and swollen (periorbital cellulitis), or your baby has fever along with eye symptoms
Sources
Related Resources
Related Medical Concerns
Baby Blocked Tear Duct (Watery Eye)
A blocked tear duct (dacryostenosis) is very common in newborns, affecting up to 20% of babies. It causes watery eyes and sometimes sticky discharge because tears cannot drain normally through the narrow duct into the nose. The good news is that about 90% of blocked tear ducts resolve on their own by age 12 months without any procedure.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
I'm Worried About Lazy Eye (Amblyopia)
Amblyopia (lazy eye) is the most common cause of vision loss in children, affecting about 2-3% of kids. It occurs when one eye develops weaker vision because the brain favors the other eye. The tricky part is that amblyopia often has no obvious outward signs - the eye usually looks normal. Early detection through routine vision screening is critical because treatment is most effective in the first few years of life.
Anaphylaxis Signs in Baby
Anaphylaxis is a severe, potentially life-threatening allergic reaction that affects multiple body systems. In babies, it can be caused by food (most commonly), insect stings, or medications. Signs include widespread hives, facial or throat swelling, difficulty breathing, persistent vomiting, and becoming limp or unresponsive. Anaphylaxis is a medical emergency. If you suspect anaphylaxis, use an epinephrine auto-injector if available and call 911 immediately. Early recognition and rapid treatment lead to excellent outcomes in the vast majority of cases.
My Baby Has Unequal Pupils
Slight differences in pupil size (anisocoria) can be normal and affect up to 20% of people, including babies. However, if the difference is large, came on suddenly, or is accompanied by other symptoms like drooping eyelid, vision changes, or neurological symptoms, it needs immediate medical evaluation to rule out serious causes.
My Baby Stops Breathing Briefly (Apnea)
Brief pauses in breathing lasting under 10 seconds are very common in newborns and are called periodic breathing. This is a normal pattern where the baby breathes rapidly, then pauses briefly, then resumes. However, true apnea (pauses lasting 20 seconds or longer, or shorter pauses accompanied by color changes or heart rate drops) is a medical concern that should be evaluated promptly.