What should you know about conjunctivitis due to allergies?

Allergic conjunctivitis happens when the eye surface reacts to a trigger such as pollen, dust, animal dander or another irritant. Most people notice itching, watering, redness and puffy eyelids; symptoms may appear in both eyes because the trigger reaches both sides. Sneezing or an itchy, blocked nose may occur at the same time.

Thick discharge, significant pain, marked Light Sensitivity or reduced vision is less typical of a simple allergy. Viral or bacterial conjunctivitis can overlap with allergy symptoms, so a new or unusually severe episode should be assessed rather than treated by guesswork.

Try to identify and limit the trigger without rubbing your eyes. Wash your face and hands after outdoor exposure, keep bedding clean, and use a cool clean compress for puffy or itchy lids. Avoid contact lenses and eye makeup while the eyes are inflamed. Ask a pharmacist or clinician which allergy treatment is suitable for you, especially if you have other conditions or take regular medicines.

Do not use someone else’s drops or rely on antibiotic medicine for an allergy. Arrange a GP Consultation if symptoms recur, interfere with sleep or work, or do not improve after avoiding the suspected trigger.

Seek urgent assessment for eye pain, new vision change, severe swelling, strong light sensitivity, breathing difficulty, facial swelling or symptoms after a chemical splash. Get prompt advice if only one eye is severely affected, discharge becomes heavy, or contact-lens use is involved.

Ask which trigger is most plausible, whether you need allergy drops or another treatment, how long to avoid contact lenses, and what changes suggest infection instead. Tell the clinician about seasonal timing, pets, dust exposure, nasal symptoms, Eye Discharge and any previous reactions.