what would cause an eyelid to swell?
The most common cause of eyelid swelling is eye allergies. Eye allergies sometimes cause significant discomfort, often interrupting daily activities with annoying symptoms such as eyelid irritation and swelling. Eye allergies develop when the immune system overreacts to a certain allergen.
Eyelid Swelling Causes. Eyelid swelling may be caused by nail polish, makeup, hair spray allergies, animals or plant allergies, chemical allergies. Allergies of animals are more commonly caused by any pet such as cats or dogs. Blepharitis is a very exasperating situation which reoccurs and causes inflammation of the eyelids.