Eye md says i have mild blepharitis. upper eyelids swollen and red/purple & small hive under left eye. tried ocusoft & benadr. will doxycylcine help?

Yes: It sounds as if there is something more than just blepharitis going on.

Blepharitis: If the correct diagnosis is indeed blepharitis, then yes, doxycycline or tetracycline will likely help quite a bit. Usually blepharitis has to be fairly severe for me to put my patients on these antibiotics, but they are usually quite helpful. Discuss this carefully with your eye doctor as a possible treatment. Also, discuss the proper lid cleaning technique for treating blepharitis.