So, what causes eye allergies?
So, what causes
When people who are prone to allergies come into contact with allergens, their immune system can overreact.
When this happens, immune cells called mast cells release large amounts of histamine, which binds to receptors in tissues, causing them to enlarge or dilate. It's your body's way of fighting off the allergen. But for you, it means your eyes get swollen, watery, itchy, and irritated.