Because one can get swelling eyelids if he or she suffer eye allergies. Eye allergies can lead to the leaks in the subcutaneous capillary beds, so it can cause swelling around your eyes, as well as swelling in the face. Puffy eyes are also the possible result and conjunctivitis, stye, ocular shingles, etc. can also cause swelling of the eyelids.
Eye allergies could cause some symptoms like watery eyes, redness, dryness and eyelids swollen because the allergies cause inflammation of the tissue around or in eyes or excessive fluid collected around. To reduce its puffiness, you should treat the allergy at once. Normally speaking, the inflammation caused by allergy comes and goes very fast. As long as if you stay away from the allergens, these annoying symptoms would clear out very soon. If you still feel your eyelids puffy, you could wash your eyes with some water and massage your eyes gently to help blood circulation and fluid absorption.
Actually, almost all allergic eye conditions are more irritating than dangerous. Scarring of the cornea and visual problems are commonly due to allergic or vernal keratoconjunctivitis. Well, typical symptoms associated with eye allergies include inflammation of the conjunctiva that is caused by a reaction to allergens. That is, the inflammation causes enlargement of the blood vessels in the conjunctiva that cause a red or bloodshot appearance of the eyes. These symptoms can range from very mild redness to severe swelling associated with discharge.