Hormones called androgens overstimulate the skin's oil glands, which frequently leads to a breakout around menstruation. (If you break out along your jawline, this is the likely culprit.) Some women find relief by going on oral medications, such as contraceptives, but you'll need to discuss the benefits and risks with your doctor.
Similarly, for some women, pregnancy can cause a spike in acne. Progesterone increases during pregnancy, which can affect the skin's oil levels. While several safe treatment options exist, others such as isotretinoin and tetracycline can cause birth defects. To be safe, talk with your obstetrician before embarking on a new skin-care routine.
