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.
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By Age
What to expect by age
0-28 days
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.
1-6 months
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.
6-12 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.
12-36 months
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
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
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.
Achondroplasia (Dwarfism) in Babies
Achondroplasia is the most common form of short-limbed dwarfism, affecting about 1 in 15,000 to 40,000 births. It is caused by a mutation in the FGFR3 gene and is usually apparent at birth with characteristic features including short limbs, a larger head, and a prominent forehead. Intelligence is normal. With monitoring for specific complications and supportive care, children with achondroplasia lead full, active, and independent lives.
Adenoid Hypertrophy and Breathing
Adenoids are lymphoid tissue located behind the nose that help fight infection in young children. When adenoids become enlarged (adenoid hypertrophy), they can block the nasal airway, causing chronic mouth breathing, snoring, nasal speech, and sleep-disordered breathing. Enlarged adenoids are most common between ages 2-7 and are a leading cause of obstructive sleep apnea in young children. Treatment ranges from watchful waiting and nasal steroids to surgical removal (adenoidectomy) if breathing or sleep is significantly affected.
How to Advocate for Your Child's Needs
You know your child better than anyone, and your observations matter. If you feel something is not right with your child's development or health, you have every right to ask questions, request evaluations, and seek second opinions. Advocating for your child is not being difficult - it is being a good parent.
Air Quality and Baby Health
Babies and young children are more vulnerable to air pollution than adults because they breathe faster, their lungs are still developing, and they spend more time close to the ground where some pollutants concentrate. The EPA recommends keeping babies indoors when the Air Quality Index (AQI) exceeds 100 (orange level). During wildfire smoke events, keep windows closed, use air purifiers with HEPA filters, and monitor your child for coughing, wheezing, or difficulty breathing. Long-term exposure to air pollution can affect lung development.