Bacteria living in pores create by-products that cause the oil/ skin cells to become sticky and clog up the pore (making a happy bacteria home). A mild benzoyl peroxide product (2.5%, like the one Neutrogena makes) + topical clindamycin has been clinical shown to decrease all forms of acne (comedones, papules, pustules, etc).

Circulating androgens accelerate this process, which is why BC pills may clear up your skin.

"It is easier for the world to believe a simple lie than a complex truth." - attributed to Alexis de Tocqueville