Why Do My Eyes Itch so Much During Allergy Season?
Medically reviewed by Andre Stone | MD, University of Pittsburgh School of Medicine on August 25th, 2026.
Your eyes itch during allergy season because airborne allergens trigger histamine release in your eye tissues. When pollen, dust, or mold spores contact your eyes, your immune system mistakes them as threats and releases histamine to fight them off. This histamine causes blood vessels in your eyes to dilate and become inflamed, leading to that characteristic itching, redness, and watering. Tree pollen is a common spring allergy trigger, and pollen from trees such as oak, birch, and maple may cause symptoms. The conjunctiva, a thin membrane covering the white part of each eye and lining the eyelids, contains mast cells that release histamine during an allergic reaction. Wind can worsen symptoms by blowing more pollen directly into your eyes.
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