Eyes red and itchy: what should you know?

Allergic conjunctivitis can make both eyes red, watery, and intensely itchy, sometimes alongside sneezing or a blocked nose. Allergic rhinitis may link the eye symptoms with nasal congestion. Dust mites, pets, pollen, smoke, cosmetics, contact lenses, and dry air can irritate the eye surface. Itching is a useful clue, but it does not identify one cause by itself. Sticky discharge, eyelid swelling, or symptoms starting in one eye can point to a different problem and deserve clinical advice if they persist.

Do not rub your eyes, because rubbing can further inflame the surface. Wash your hands, remove contact lenses, and use a clean cool compress over closed eyelids. Avoid the suspected trigger and keep pillowcases and bedding clean if dust is a concern. A pharmacist or clinician can advise whether lubricating drops or allergy medication is suitable; do not share eye drops or use someone else’s prescription. Seek advice if symptoms are not settling or keep returning.

Arrange prompt medical assessment for moderate or severe eye pain, blurred or reduced vision, marked light sensitivity, a very swollen eyelid, or a feeling that something is stuck in the eye. Get urgent help after a chemical splash, eye injury, or sudden change in sight; rinse a chemical exposure with clean running water while seeking help. Fever with significant swelling around the eye also needs urgent attention.

Ask: Could this be allergic conjunctivitis or another cause? Should I stop wearing my contact lenses? Which drops are appropriate for my symptoms? What warning signs should make me return urgently? Mention when the redness began, whether one or both eyes are affected, any discharge, new products, and known allergies.