Sleep and stress in perimenopause: why you feel wired but tired

Perimenopause disrupts sleep because falling and fluctuating estrogen is linked to trouble falling and staying asleep, night sweats can wake you, and stress and worry keep your body on alert when you want it to power down.¹ That mix produces the familiar feeling of being wired but tired. The first-line treatment recommended by the American College of Physicians for chronic insomnia is not a supplement or a gadget. It is cognitive behavioral therapy for insomnia, known as CBT-I.²

Perimenopause is usually introduced through hot flashes. But sleep trouble is common in this stage, and it often arrives without any hot flashes at all. In Moody's own data, insomnia climbs more than hot flashes or night sweats as women move into perimenopause. Mayo Clinic says the same thing in a different way: changes in sleep patterns can happen in perimenopause even without hot flashes or night sweats.³

Why does perimenopause disrupt your sleep?

The best data come from SWAN, the Study of Women's Health Across the Nation. In a cross-sectional analysis of more than 12,000 women aged 40 to 55, more than a third reported difficulty sleeping in the previous two weeks. The share rose from premenopause to late perimenopause, and late perimenopausal women reported the most difficulty. Waking in the night was the most common problem. Declining estradiol, the main form of estrogen before menopause, was linked to trouble falling and staying asleep.¹ Progesterone is often described as calming as well, so a bumpier supply of both hormones plausibly shifts how easily you drop off and how deeply you stay asleep. You can read more about estrogen and progesterone.

Sleep loss then feeds everything else. The NHS notes that poor sleep can leave you feeling irritable, stressed and anxious, and that mood and memory problems may feel worse when you are tired.⁴ That is why this guide sits so close to mood swings and anxiety and brain fog.

Is it night sweats or insomnia?

Often it is both, and it matters which is leading. In the SWAN data, night-time symptoms and sleep trouble moved together in a dose-dependent way. Women with hot flashes or night sweats on one to five nights in the previous two weeks were roughly a third more likely to report sleep disturbance. Women with symptoms on six or more nights were more than twice as likely.¹ But the same analysis found that sleep problems continued after menopause even in women without hot flashes, so sweats do not explain everything.¹ Mayo Clinic puts it simply: trouble sleeping is often due to hot flashes or night sweats, but not always.³

A useful question to ask yourself is what wakes you. If you wake hot, damp and kicking off the covers, heat is probably in the driving seat. If you wake in the dark with a busy mind and no heat at all, you may be dealing with insomnia that has its own momentum. The answer changes what is worth trying, and it is useful to tell your doctor.

What does cortisol have to do with feeling wired but tired?

Cortisol is a hormone made by your adrenal glands that plays a key role in your stress response. It follows a daily rhythm: it peaks in the morning, shortly before you wake, and is lower in the evening, and it is involved in your circadian rhythm and in how your body wakes up.⁵ Cleveland Clinic also notes that the link runs both ways: chronic sleep problems such as insomnia can themselves lead to higher cortisol.⁵ You can read more in what cortisol does.

This is worth being careful about. You will often see claims online that perimenopause raises your cortisol and that the right routine will balance it. Those claims go further than the research we could find, and "wired but tired" is a description of how you feel, not a measurement of a hormone. A more defensible way to think about it is stress physiology. Night sweats that wake you, worry about not sleeping, a full schedule and a lighter sleep all keep your stress response engaged, and a body that stays alert is hard to put to bed. If you are curious about testing, our hormone testing guide explains what tests can and cannot tell you.

The habits below are reasonable ways to lower arousal and keep a steady rhythm. They are not a way to balance your cortisol, and you do not need to know your cortisol level to try them.

What actually helps with sleep in perimenopause?

CBT-I is the strongest option. The American College of Physicians recommends CBT-I as the initial treatment for chronic insomnia in adults.² Chronic means trouble sleeping at least three nights a week for three months or longer. CBT-I is usually delivered in weekly sessions of 30 to 60 minutes over six to eight weeks. It combines changing unhelpful thoughts about sleep, keeping the bed for sleep and sex, limiting time in bed so that sleepiness builds, and relaxation training.⁶ For women with night sweats, a small pilot trial of 43 perimenopausal and postmenopausal women tested a version adapted for menopause. Insomnia severity improved more than with menopause education at the end of treatment and a month later, although the difference was no longer significant at three months, and the authors note the trial was small.⁷ The 2023 Menopause Society statement on nonhormone therapy also reports that CBT reduces how bothersome hot flashes are, and that women with hot flashes and insomnia improved with CBT for insomnia in a pooled analysis.⁸

Change the sleep environment for heat. Keep the bedroom cool, dark, quiet and ventilated, and choose breathable bedding and nightwear, because heat can set off night sweats. A sleep mask can help with light.

Make your timing predictable. Going to bed and waking at the same time each day, even on weekends, supports your body clock. Limit long or late-afternoon naps, which can take the edge off the sleepiness you need at night. Some women find that stepping outside for daylight soon after waking helps anchor their rhythm.

Watch what you take in late in the day. Caffeine and alcohol can disrupt sleep and may make hot flashes worse for some women. Heavy meals late in the evening can get in the way of winding down.

Move, but not too late. Regular daily activity tends to help sleep, but vigorous exercise close to bedtime can leave you too wound up to settle. Gentle stretching, a warm bath, reading or slow breathing in the evening can signal that the day is over.

Rethink screens. Stepping away from phones and tablets for an hour before bed can help, partly because their light can interfere with melatonin.

Be realistic about supplements. The 2023 Menopause Society statement does not recommend supplements or herbal remedies for hot flashes, finding negative or insufficient evidence.⁸ Ashwagandha is popular for stress and sleep. The NIH Office of Dietary Supplements says a few small studies suggest it may help people with sleep trouble fall asleep faster, sleep longer and wake less, but the benefit seems small, long-term safety is unclear, it has been linked to liver injury in some people, and it may interact with thyroid, diabetes and blood pressure medicines and with sedatives.⁹ Supplements can interact with prescription medicines, so check with a doctor or pharmacist before starting one. Herbal tea in the evening is a harmless wind-down ritual, though it is the ritual, more than the herbs, that is likely to matter.

When should you see a doctor about sleep?

See your doctor if you have had trouble sleeping at least three nights a week for three months or longer, if night sweats are persistent, if sleep problems continue despite changes to your habits, or if they are affecting your days. Also go if poor sleep comes with severe anxiety or low mood. Treatments for night sweats and low mood may include hormone therapy, antidepressants or CBT, depending on your health, and that is a decision to make with a doctor.¹⁰ Our guide to HRT and hormone testing explains the basics. The first step is the same for everyone: tell someone it is happening.

Read next: Brain fog in perimenopause, Clean sleeping, Perimenopause mood swings and anxiety