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Eye Allergies

An allergic reaction causing red, itchy, and watery eyes.

Eye Allergies

Symptoms

Common signs to watch for.

  • Itching in both eyes
  • Redness and watering
  • Swollen eyelids
  • Stringy mucus discharge
  • Burning sensation
  • Symptoms worsen during certain seasons or around pets

Home Care Tips

Things you can do at home to relieve symptoms.

  • Apply cold compresses to relieve itching
  • Use over-the-counter antihistamine eye drops
  • Avoid rubbing your eyes
  • Keep windows closed during high pollen counts
  • Wash bedding frequently in hot water
  • Remove contact lenses during flare-ups

When to Seek Professional Help

Contact us immediately if you experience any of the following:

  • Symptoms persist despite over-the-counter treatment
  • Vision is affected
  • You develop eye pain (not just itching)
  • Only one eye is affected (may indicate infection)
  • Your eyelids become swollen shut

About Eye Allergies

Understanding Allergic Conjunctivitis

Eye allergies, or allergic conjunctivitis, occur when the immune system overreacts to airborne environmental allergens. When these substances come into contact with the conjunctiva (the clear membrane covering the white part of the eye and inner lids), mast cells release histamine and inflammatory mediators, prompting intense itching, redness, swelling, and watering.

Allergic conjunctivitis can be seasonal (triggered by outdoor pollens and moulds) or perennial (persisting year-round due to dust mites, pet dander, or indoor irritants). Unlike bacterial or viral pink eye, allergic conjunctivitis is non-contagious and almost always affects both eyes simultaneously.

Common Environmental Triggers

  • Pollen from trees, grasses, and weeds
  • House dust mites and microscopic debris
  • Pet dander and fur
  • Airborne mould spores
  • Cigarette smoke, aerosols, and strong perfumes
Important: Vigorous eye rubbing triggers the release of additional histamine, worsening inflammation and increasing the risk of corneal scratches or long-term corneal thinning (keratoconus).

Sources & Medical References

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