Premenstrual Dysphoric Disorder (PMDD) is a severe and often debilitating condition affecting around 5-8% of women of reproductive age. Although initially thought to be a disorder of hormonal imbalance, recent research is supporting the notion that it is more so a sensitivity to hormonal fluctuations. While the exact cause of PMDD remains elusive, emerging scientific research has shed light on potential drivers, offering hope for more targeted treatment approaches.