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Allergic conjunctivitis is inflammation of the eye surface caused by allergens. It is not contagious.
Symptoms
Both eyes are usually itchy, watery and red, with puffy lids and stringy discharge. Vision should remain clear once tears are blinked away.
The symptoms of allergic conjunctivitis can overlap with other childhood conditions. Age, timing, severity and effects on breathing, hydration, feeding, sleep and activity help a clinician decide what assessment is needed.
Causes
Pollen, dust mites, animal dander and mould can trigger the reaction. Nasal allergy and eczema commonly coexist.
Risk factors
A risk factor changes the likelihood of allergic conjunctivitis but cannot confirm a diagnosis. Children without recognised risk factors may still be affected, while many children with risk factors never develop the condition.
Diagnosis
Diagnosis is usually clinical. Eye pain, light sensitivity or reduced vision suggests another condition and needs prompt examination.
Online information cannot diagnose allergic conjunctivitis. A qualified professional may need to examine the child, review medicines and medical history, and interpret tests in context.
Treatment
Cool compresses, allergen reduction and age-appropriate antihistamine eye drops or medicines may help. Avoid rubbing and do not use leftover eye drops.
Treatment for allergic conjunctivitis should match the child’s age, weight, severity and other health needs. Check medicine names, doses and suitability with a qualified professional, and never use another person’s prescription.
Home care
When a professional has said that mild allergic conjunctivitis can be managed at home, follow the care plan, support rest and fluids where appropriate, and note meaningful changes. Avoid unproven remedies and adult medicines.
Prevention
Not every case of allergic conjunctivitis can be prevented. Current vaccination, hand and respiratory hygiene, safe food handling, trigger reduction and correct use of prescribed preventive treatment can lower relevant risks.
Possible complications
Possible complications of allergic conjunctivitis depend on severity, duration and the child’s underlying health. Earlier review is appropriate when symptoms worsen, recovery stalls or normal drinking, breathing, sleep or activity is affected.
When to seek urgent medical care
Urgent eye care is needed for pain, light sensitivity, reduced vision, severe swelling, injury, chemical exposure or breathing and throat symptoms suggesting anaphylaxis.
If a child with possible allergic conjunctivitis seems seriously unwell, seek urgent professional help even when every listed sign is not present. Call the local emergency number for collapse, unresponsiveness, severe breathing difficulty or another immediate threat to life.
Frequently asked questions
Can symptoms alone confirm the condition?
No. Symptoms associated with allergic conjunctivitis may have several causes, so examination or tests may be needed before treatment is chosen.
Can home care replace an assessment?
Home care may support a mild, assessed case of allergic conjunctivitis, but it cannot replace medical evaluation when warning signs, worsening symptoms or uncertainty are present.
When is follow-up appropriate?
Arrange follow-up for allergic conjunctivitis when symptoms persist, recur, interfere with normal function or fail to improve as expected. Seek urgent help sooner if warning signs appear.
Summary
Allergic conjunctivitis is inflammation of the eye surface caused by allergens. It is not contagious. Careful observation, evidence-based treatment and clear knowledge of urgent warning signs help families respond without trying to diagnose the child themselves.
References and further reading
These official health resources provide further guidance relevant to allergic conjunctivitis. Recommendations can change, and local professional advice should guide individual care.
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Evidence-based, clearly reviewed.
Healthier Baby Today articles are reviewed for accuracy and updated as guidance changes.
Last updated: July 17, 2026
