why are my eyes so itchy

The most common reason for itchy eyes is an allergy. Allergic reactions cause the body to release histamine in the eyes, which leads to irritation, redness, and itching. Common allergens include pollen, animal fur or dander, dust mites, mold, and certain cosmetic or eye care products. Itchy eyes may also be caused by dry eye syndrome, exposure to irritants such as smoke or chemicals, infections like conjunctivitis, inflammation of the eyelids (blepharitis), contact lens issues, or skin conditions like eczema near the eyes. If the symptoms are seasonal, allergens like pollen are likely triggers. If the itching occurs year-round, indoor allergens such as dust mites or mold may be responsible. Environmental irritants, wearing contact lenses improperly, or having dry eyes (due to insufficient tear production) can also cause itching. In summary, itchy eyes typically result from an allergic reaction, but other causes like dryness, infection, or irritation should be considered especially if symptoms persist or worsen.