Perimenopause Night Sweats
In short: estrogen drops just before and during your period. In perimenopause, when estrogen is already swinging, that drop is often enough to set off night sweats. If yours come in a monthly pattern, hormones are very likely the reason.
Why that week
Across a cycle, estrogen rises toward ovulation, then falls before your period. In your 30s that fall was gentle. In perimenopause, cycles become irregular and the peaks and troughs get bigger. Your brain's thermostat reacts to the trough by firing off hot flashes, and at night they show up as sweats.
How to tell it's hormonal
- It comes and goes with your cycle.
- You're in your late 30s, 40s or early 50s.
- Your periods are changing: shorter or longer cycles, heavier or lighter flow.
- You notice other changes: lighter sleep, early waking, mood shifts.
A two-month log of night sweats next to your cycle is the best thing to bring to your doctor.
Getting through the week
- Plan ahead. Put lighter bedding on a day or two before your period is due.
- Cut the extra triggers that week: alcohol, late caffeine, spicy dinners.
- Dress for the swing: moisture-wicking top, spare top and water on the nightstand.
- Cool the sleep surface. Good Sleep's page on menopause and sleep explains why the surface temperature matters more than the room.
For more on bedroom temperature through the transition, see this menopause sleep temperature guide.
When to see a doctor
Talk to your doctor if night sweats regularly disrupt your sleep, if your periods become very heavy or very frequent, or if you have bleeding between periods. Hormonal and non-hormonal treatments can help.