My upper eyelids have been swollen for 24 hours and benadryl (diphenhydramine) doesn't seem to be helping. it started with the left and now the right is equally swollen?

Seek your doctor: Swelling of one eye is problematic enough; but when it spreads to the other eye you should call your doctor and have him/her examine your. The causes can be multiple but best not to delay diagnosis and treatment as we only get one pair of eyes!

See your eye doctor: Swollen eyelids are never normal. Allergic swelling should decrease with benadryl, (diphenhydramine) so this may have a different origin, or require different forms of medication. See an eye doctor soon; they can rapidly diagnose the condition and start you on the right treatment regimen.