Cold and itchy eyes: what to know

Allergy more often causes itch in both eyes with sneezing and a clear runny nose; a viral illness may bring cough, sore throat, tiredness or thicker discharge.

Allergic conjunctivitis causes itching, redness and watering when the eye surface reacts to an allergen. Allergic rhinitis can add nasal congestion and sneezing. House dust mite or pet allergy may produce symptoms after exposure, while irritants such as smoke, dust or cosmetics can cause burning. A cold may make the eyes watery, but intense itch is more suggestive of allergy than infection.

Itchy eyes are a symptom and do not prove a particular allergy. One-sided marked redness, sticky discharge or pain may need a different assessment.

Avoid rubbing your eyes and wash your hands before touching them. A cool clean compress can soothe itching. Limit exposure to smoke, dust, pet dander and any newly used eye product; keep windows closed when outdoor triggers are high and wash your face after exposure. A pharmacist can advise on allergy medication or suitable lubricating drops. Do not share towels, eye makeup or drops, and remove contact lenses if they make symptoms worse.

Get urgent eye care for severe pain, light sensitivity, vision change, an eye injury, marked swelling or difficulty opening the eye. Seek prompt help if swelling affects the lips or tongue, breathing becomes difficult, or symptoms follow a food or medicine exposure. Arrange a review for persistent discharge, worsening redness or symptoms that do not settle after avoiding a suspected trigger.

Ask whether the pattern suggests allergy, infection or irritation; which drops are safe with contact lenses; how to reduce exposure to likely triggers; and whether recurrent symptoms need allergy assessment.