Acne is a broad term to describe clogged pores.Your pores can get clogged from a combination of dead skin cells, sebum, and bacteria.
Noninflammatory acne, such as blackheads and whiteheads, is a combination of dead skin and sebum, while inflammatory acne has a bacterial component, causing cysts and nodules.

What is an acne facial? This treatment deeply purifies the skin and often includes rounds of extractions to unclog the pores.