Allergic conjunctivitis: itchy eyes — don't rush to rub them

Recognising the signs

Both eyes itch intensely at the same time, turn red, and water. There is often a clear, watery discharge. It happens in a particular season or after contact with a specific environment, and it comes with sneezing and a runny nose — this is most likely an allergy. Infectious conjunctivitis usually starts in one eye, has thick yellow discharge, and can spread to others.

Why you should not rub

Rubbing your eyes releases more inflammatory mediators, so the more you rub, the more it itches. It can also scratch the cornea and introduce bacteria. Cold compresses can relieve symptoms for a while and are a safer way to ease the itch.

Common triggers

Pollen, house dust mite, pet dander, mould spores, and contact substances such as cosmetics and contact lens care solutions. If you wear contact lenses, it is best to stop wearing them during an episode and replace the lenses or the lens case.

Principles of management

First, move away from the trigger, apply cold compresses, and keep your hands away. If it keeps coming back, see an eye department or allergy department for assessment, and use medication properly if needed. If it happens in the same season every year, you can prepare a plan in advance under a doctor's guidance.

This article is for general information only and is not medical advice. Please follow your doctor's instructions.