A 52-year-old woman presented with a 1-year history of nonpruritic, non-tender erythematous papules on her face. She said she occasionally felt tightness and burning. The lesions initially responded to treatment with topical corticosteroids, but reappeared when the corticosteroids were discontinued. She was taking glyburide for type 2 diabetes and was allergic to sulfa-containing medications.
The most likely diagnosis is
Acne vulgaris
Contact dermatitis
Papular sarcoid
Perioral dermatitis
Rosacea