system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: How does hormonal acne work?

What hormones are involved? How does that affect your skin?
gpt
Some changes in hormone levels, caused by stress, or natural changes in your body, can increase the amount of oil (sebum) your skin produces. This oil exits through tiny holes in your face, your pores. That oil is thick, and because the holes are tiny these holes can get clogged, creating pimples or acne.