Conjunctivitis (acute allergic)

Acute allergic conjunctivitis is an urticarial reaction caused by contact between allergens and the conjunctiva. It can cause sudden swelling, itching, erythema and oedema. Most cases are self-limiting and get better within a few hours without the need for treatment. This Clinical Management Guideline outlines the aetiology, signs and symptoms and evidence-based recommendations for diagnosing and treating acute allergic conjunctivitis. It provides recommendations for non-pharmacological and pharmacological management and treatment to relieve symptoms.

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What is acute allergic conjunctivitis?

Acute allergic conjunctivitis is an allergic reaction of the eyes, which causes a sudden swelling and redness of the eyelids and conjunctiva (the clear membrane covering the white of the eye), often associated with itching. It usually occurs in sensitised people who come into contact with grass pollen or animal fur. 

How is acute allergic conjunctivitis managed?

Most cases get better within a few hours without the need for treatment. However, anti-allergy eye drops may help to control symptoms in the short term and in people with recurrent episodes.

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Last updated

Conjunctivitis (Acute Allergic)
Version 14
Date of search 08.12.22
Date of revision 23.02.23
Date of publication 30.03.23
Date for review 07.12.24
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