Many reasons: Swelling of the eyelids are often related to allergens, trauma, external irritant (something in your eye). Sometimes washing out will help (boric acid solution), icing it to reduce the swelling. If it does not abate soon or worsens, an ophthalmologist is the person to consult.
Answered 1/17/2013
5.4k views
? stye: Many issues can cause an upper eyelid to swell. Try using artificial tears, ointment at night, warm compresses. If no improvement, see an eye doctor.
Answered 1/17/2013
5.4k views
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