As your estrogen levels decrease, your balance of androgens to estrogenic hormones can cause your body to create more sebum. If you're acne prone, this can lead to everything from a few occasional pimples to severe and regular acne outbreaks.

What hormones cause pimples?

Acne may be known as hormonal acne because one major causative factor is the hormone testosterone. Testosterone levels go up in the teenage years as part of puberty.

How do I know if my acne is hormonal?

Your pimples pop up around your chin and jawline.

One of the telltale signs of a hormonal breakout is its location on the face. If you're noticing inflamed cysts around your lower face—especially your chin and jawline area—you can bet your bottom dollar that it's probably hormonal acne.