Hormonal

Women with Premenstrual Dysphoric Disorder (PMDD) exhibit more severe sleep disturbances and altered circadian hormone rhythms (specifically melatonin and cortisol) during the luteal phase compared to healthy women, including phase delays in melatonin and reduced melatonin amplitude.

If you have PMDD, your sleep issues are likely tied to a physiological resistance to melatonin and altered hormone rhythms during the week before your period. This is a recognized medical condition, not just 'stress'. Discussing chronotherapeutic treatments or hormone-regulating strategies with a healthcare provider may be more effective than standard sleep hygiene advice alone.