Where Does Acne Occur?
What Causes Acne?
Whiteheads and Blackheads
Acne formation gets even more complex. In response to hormones known as androgens, like progesterone and testosterone, the sebaceous glands produce more sebum. This is why acne usually starts to occur during puberty and why women may experience more acne at the onset of menstruation.
When excess sebum is produced in already blocked pores the follicle becomes inflamed. Further inflammation can be caused by bacterial overgrowth as well. Together, this causes a papule to form, which is a red, raised bump on the skin.