Dealing with acne before your period? Hormones are likely the culprit. The hormonal fluctuations that happen prior to menstruation can boost oil production, leading to clogged pores and breakouts, particularly along the jaw and chin. Professionals note that factors like high stress, lack of sleep, and an improper diet can make these flare-ups worse. Maintaining a nutritious diet, following a consistent skincare routine, and adopting healthy habits can assist in managing hormonal acne.