When estrogen dips and progesterone and androgens have more relative influence (typically the luteal phase, the week or so before your period), people often notice breakouts along the lower face, jawline, chin, and sometimes the neck. They tend to be deeper, tender, cyst-like bumps rather than surface whiteheads, and they often show up in the same spots cycle after cycle. You might also notice oilier skin and more sensitivity around that time. Since this pattern overlaps with hormonal and cystic acne territory, and since hormone shifts can signal other things going on, it's worth bringing to a healthcare provider or dermatologist if it's persistent or painful.