Night Sweats in Perimenopause: What Actually Helps

You wake up hot, damp and wide awake, sometimes more than once a night. Night sweats are hot flashes that happen while you sleep, and they are one of the most common reasons sleep falls apart in perimenopause. There is plenty of advice online, but not all of it works. This guide explains what causes night sweats, how long they tend to last, which treatments research supports, simple comfort tips for the night itself, and when to see a doctor.

By the Luna Flow team · Last updated

Checked against ACOG's 2026 menopause guideline, The Menopause Society's 2023 position statement, Mayo Clinic and the published study listed in the sources. This is an editorial source review, not an independent clinical review.

Night sweats rarely come alone. Check your other symptoms in 2 minutes with our free Perimenopause Symptoms Checklist →

What causes night sweats in perimenopause?

Menopause is one of the most common causes of night sweats. They are the night-time version of hot flashes, which doctors call vasomotor symptoms, and they are linked to the hormonal changes of the menopause transition.

Night sweats can also have other causes, including anxiety, some medicines such as antidepressants, thyroid problems, sleep apnea and infections. That is why new or unusual night sweats are worth checking with a doctor.

See how night sweats fit with other symptoms in Perimenopause Symptoms: The Complete List →

How long do perimenopause night sweats last?

Often longer than people expect. The US Study of Women's Health Across the Nation (SWAN) followed 1,449 women with frequent hot flashes or night sweats.

  • Symptoms lasted a median of 7.4 years in total.
  • Women whose symptoms started early, before or early in perimenopause, had them longest: a median of more than 11.8 years.
  • Women whose symptoms started after their last period had them for a median of 3.4 years.

What actually stops night sweats? The evidence

If night sweats are wrecking your sleep, the options that reduce them are medical or psychological, and they are worth a conversation with your doctor. The American College of Obstetricians and Gynecologists (ACOG) updated its guidance in October 2026.

  • Hormone therapy: ACOG strongly recommends it for hot flashes, night sweats and the sleep problems they cause, in women without contraindications, ideally starting before 60 or within 10 years of menopause. It isn't suitable for everyone, for example women with breast cancer or a history of blood clots.
  • Non-hormonal medicines: for women who can't or don't want to take hormones, ACOG strongly recommends certain antidepressants (SSRIs or SNRIs) and newer medicines called neurokinin receptor antagonists, such as fezolinetant.
  • CBT, clinical hypnosis and acupuncture: ACOG suggests these for hot flashes, based on low- to moderate-quality evidence. They are often used alongside medicines.
  • Not supported: soy, herbal and other supplements are not supported by current evidence. The Menopause Society also found too little evidence that cooling techniques, avoiding triggers, exercise or yoga reduce hot flashes.

Comfort tips for nights with night sweats

Several of these self-care measures come from Mayo Clinic advice for hot flashes. They won't stop night sweats, but they may help you feel cooler and get back to sleep faster.

  • Keep your bedroom cool and well ventilated. A fan or an open window can help.
  • Choose loose, breathable nightwear and layered bedding you can push off.
  • Try slow, deep breathing when you feel a hot flash starting.
  • Keep a glass of cold water and a spare top by the bed.
  • If you wake, cool down and change if needed, without bright lights or your phone.
  • Limit warm drinks, spicy food, caffeine and alcohol in the evening, and avoid tobacco.

A record of how often night sweats happen makes your appointment more useful. Read How to Track Perimenopause Symptoms →

When to see a doctor about night sweats

Mayo Clinic advises making an appointment if night sweats:

  • Happen regularly.
  • Disrupt your sleep.
  • Come with fever, weight loss, pain in one area, a cough, diarrhea or other worrying symptoms.
  • Start months or years after your other menopause symptoms have ended.

Track your night sweats and sleep free with Luna Flow →

Frequently asked questions

How long do night sweats last in perimenopause?

Often for years. In one large study, hot flashes and night sweats lasted a median of 7.4 years, and longer for women whose symptoms started early in perimenopause.

Does sleeping in a cool room stop night sweats?

No. It can make them more comfortable, but cooling techniques haven't been shown to reduce how often they happen.

Is hormone therapy the only treatment for night sweats?

No. ACOG strongly recommends certain non-hormonal medicines for women who can't or don't want to take hormones, and suggests CBT, clinical hypnosis or acupuncture. A doctor can help you weigh the options.

Can night sweats be a sign of something other than perimenopause?

Yes. Anxiety, some medicines, thyroid problems, sleep apnea and infections can all cause them. See a doctor if they come with fever, weight loss or other new symptoms.

Sources

This guide is for personal awareness and does not replace professional medical advice, diagnosis or treatment.