What should you know about a red and itchy eye?

Allergic conjunctivitis often causes itching, watering, puffiness, and redness, sometimes after pollen, dust, pets, cosmetics, or another trigger. Rubbing releases more inflammatory chemicals and can intensify the itch. Conjunctivitis may also cause redness and irritation, with watering or discharge; it can spread between people when infectious.

One-sided severe symptoms, a foreign-body sensation, or marked light sensitivity are less typical of simple allergy. Contact lens wear adds concern because the cornea may be affected.

Avoid rubbing and wash your hands after touching the eyes. A cool clean compress can reduce itch and swelling. Limit exposure to the suspected trigger, keep windows closed during dusty conditions, and wash your face or shower after outdoor exposure if that helps.

Pause contact lenses and eye makeup while symptoms continue. A pharmacist can advise about lubricating or allergy drops suited to you. Do not share towels, pillows, or eye products, and do not use leftover prescription drops.

Seek urgent care for pain, reduced vision, strong light sensitivity, significant swelling, injury, chemical exposure, or symptoms in a contact lens wearer. Arrange medical advice if discharge develops, symptoms persist, or redness is worsening rather than settling.

Ask whether allergy, infection, dry eye, or an eyelid problem best fits the pattern. Discuss trigger avoidance, suitable drops, how long to stop lenses, and which changes should lead to urgent review.