Why Am I So Tired? Understanding Sleep Changes During Perimenopause and Menopause

One of the most common concerns I hear from women in my practice is, "I'm exhausted, but I can't sleep." Sleep changes start during perimenopause. Some women have trouble falling asleep. Others fall asleep without much difficulty but find themselves staring at the ceiling at 2 or 3 in the morning, unable to get back to sleep. Some wake up multiple times throughout the night, while others spend eight hours in bed and still wake feeling exhausted.

Sleep disturbances are one of the most common symptoms women experience during perimenopause and menopause. Yet many women are told that poor sleep is simply part of getting older or that they need to try harder to improve their sleep habits.

The reality is that sleep often changes during perimenopause and menopause. Many women find that the things that used to work no longer do. You may be doing everything you've always done and still find yourself lying awake at night or waking up exhausted.

While poor sleep may feel like an inconvenience, it affects far more than how you feel the next day. Sleep influences mood, memory, concentration, metabolism, cardiovascular health, bone health, exercise recovery, and overall quality of life. Understanding what is happening is often the first step toward sleeping better.

Understanding the Stages of Sleep

Many people think of sleep as simply being awake or asleep. However, sleep is a very organized process that occurs in stages throughout the night. Each stage has a different purpose, and healthy sleep requires cycling through all of them multiple times.

The first stage, known as N1 sleep, is the transition between wakefulness and sleep. It is very light sleep and typically lasts only a few minutes. The next stage, N2 sleep, is where we spend the majority of the night. During N2 sleep, heart rate slows, body temperature drops, and brain activity begins to organize and process information from the day. This stage is important for learning, memory, and preparing the brain for deeper restorative sleep.

N3 sleep, often called deep sleep or slow-wave sleep, is the most physically restorative stage of sleep. During deep sleep, growth hormone is released, tissues repair, muscles recover, and the brain clears metabolic waste products that accumulate throughout the day. This is the stage that helps you wake up feeling physically restored.

REM sleep is when most dreaming occurs. During REM sleep, the brain processes memories, emotions, learning, and stress. Some sleep experts describe REM sleep as overnight therapy for the brain because it helps us process emotional experiences and improve resilience the following day.

A healthy night of sleep involves cycling through all of these stages repeatedly. When women tell me they are spending eight hours in bed but still waking up exhausted, this is often what I think about. The issue is not always how long they are sleeping. The issue is whether they are getting enough restorative sleep.

The challenge during perimenopause and menopause is that hormonal changes, hot flashes, night sweats, cortisol surges, bladder symptoms, sleep apnea, and other factors can repeatedly interrupt these sleep cycles. As a result, the brain and body may never get enough time in the stages of sleep that are most restorative.

How Poor Sleep Can Affect Weight Gain

One of the things that surprises many women is how closely sleep and metabolism are connected. When we think about weight gain during perimenopause and menopause, we often focus on hormones, nutrition, and exercise. Sleep is often an overlooked part of the conversation.

When we do not get enough restorative sleep, our bodies undergo several changes that make maintaining a healthy weight more difficult. Sleep deprivation affects the hormones that regulate hunger and fullness. Levels of ghrelin, a hormone that stimulates appetite, tend to rise, while levels of leptin, a hormone that helps us feel satisfied after eating, tend to fall. Therefore, we often feel hungrier and less satisfied with what we are eating.

Poor sleep also affects the brain's reward centers. Studies suggest that when we are sleep deprived, highly processed foods rich in sugar, fat, and salt become more appealing. It is not about willpower; the brain is actively pushing us toward quick sources of energy.

Sleep disruption can also worsen insulin resistance, making it more difficult for the body to regulate blood sugar. Over time, this can contribute to increased fat storage, particularly around the abdomen. For women who are exercising regularly, poor sleep creates another challenge. Deep sleep is when much of our physical recovery occurs. When sleep is fragmented, recovery suffers, workouts feel harder, and the body may struggle to build or maintain lean muscle mass. This matters because muscle plays a critical role in metabolic health. Muscle helps regulate blood sugar, supports insulin sensitivity, and contributes to the number of calories we burn at rest. I often tell patients that sleep, nutrition, movement, hormones, and metabolism are all connected. We cannot talk about weight without talking about sleep.

What Changes During Perimenopause and Menopause?

For decades, estrogen and progesterone helped regulate many of the systems involved in healthy sleep. These hormones influence body temperature, circadian rhythm, mood, stress response, and neurotransmitters such as serotonin, dopamine, and GABA.

As hormone levels begin to fluctuate during perimenopause and eventually decline after menopause, sleep often becomes less stable. In addition, our circadian rhythm can shift during midlife. Many women notice they become sleepy earlier in the evening and wake earlier in the morning. This shift, combined with hormonal fluctuations, may explain why so many women find themselves awake before dawn and unable to fall back asleep.

Women may find it harder to fall asleep. They may wake up multiple times throughout the night. They may begin waking between 2 and 4 a.m. for no apparent reason. Others may wake feeling as though they never slept deeply at all. Many women describe feeling exhausted but wired at the same time.

The Role of Estrogen

Most people think of estrogen as a reproductive hormone, but estrogen plays an important role in sleep regulation. Estrogen helps regulate body temperature, supports serotonin production, influences mood, and helps keep cortisol, our primary stress hormone, in balance. As estrogen levels fluctuate and decline, many women experience hot flashes, night sweats, anxiety, mood changes, and disrupted sleep.

Even if a woman does not fully wake up during a hot flash, her brain often experiences repeated micro-awakenings throughout the night. These interruptions can prevent the brain from reaching or maintaining deeper stages of sleep. Over time, sleep becomes fragmented and less restorative.

The Role of Progesterone

I often describe progesterone as nature's calming hormone. Progesterone and its metabolites interact with GABA receptors in the brain and may promote feelings of relaxation and improve sleep quality in some women. It also appears to support healthy sleep architecture and stable breathing during sleep. As progesterone production declines during perimenopause, many women notice increased nighttime anxiety, racing thoughts, difficulty falling asleep, and more fragmented sleep.

This is one reason some women experience significant improvements in sleep when appropriate hormone therapy includes micronized progesterone.

Why Do So Many Women Wake Up at 3 A.M.?

This may be one of the most common sleep complaints I hear. Many women tell me they fall asleep just fine but wake between 2 and 4 a.m. and cannot get back to sleep.

Several factors may be playing a part. As estrogen levels decline, cortisol can become more unpredictable. A stress response that your body was once able to handle may now wake you completely out of sleep.

Blood sugar fluctuations may also play a role. Insulin resistance becomes more common during midlife, and overnight drops in blood sugar can trigger the release of stress hormones that wake you up.

Hot flashes and night sweats may also be contributing, even if you do not remember them. On top of all of this, many women in midlife are balancing careers, relationships, aging parents, teenagers, financial responsibilities, and the emotional weight of caring for everyone around them. Sometimes the only quiet moment the brain gets all day is in the middle of the night.

Could It Be More Than Hormones?

Although hormones play a major role, they are not always the entire story. Many women think that sleep apnea only affects overweight men who snore loudly. The reality is that the risk of sleep apnea rises significantly after menopause. Women often present differently than men. Instead of loud snoring, they may experience fatigue, brain fog, morning headaches, anxiety, depression, poor concentration, or frequent nighttime awakenings. If you are spending enough time in bed but still feel exhausted, sleep apnea deserves consideration.

Restless legs syndrome is another commonly overlooked contributor to poor sleep. Women often describe uncomfortable sensations in their legs that create an overwhelming urge to move, particularly in the evening. Because low iron stores are a common and treatable cause, ferritin levels should be evaluated when restless legs symptoms are present.

Don't Forget About the Bladder

Many women begin waking multiple times each night to urinate and assume it is simply part of getting older. In reality, declining estrogen affects the bladder, urethra, and surrounding tissues. This can contribute to urgency, frequency, nighttime urination, and recurrent urinary tract infections. For some women, local vaginal estrogen can significantly improve urinary symptoms and reduce nighttime awakenings.

What Can You Do to Improve Sleep?

The foundation of better sleep starts long before bedtime. Morning sunlight is one of the most powerful tools we have for regulating circadian rhythm. Exposure to natural light within the first hour of waking helps signal to the brain when it is time to be awake and when it is time to begin producing melatonin later that evening.

Regular exercise also plays an important role. Movement improves sleep quality, insulin sensitivity, mood, and overall health. Strength training is particularly important during midlife because it supports both metabolic and bone health while improving sleep quality.

Alcohol deserves attention as well. While many women find that a glass of wine helps them fall asleep, alcohol often fragments sleep later in the night and reduces overall sleep quality.

The same is true for caffeine. As we age, caffeine tends to remain in our system longer. For many women, avoiding caffeine after noon makes a meaningful difference. Creating a consistent wind-down routine can also help. Reading, stretching, prayer, meditation, journaling, breathing exercises, or a warm bath can all help signal to the brain that it is time to rest.

One thing I remind women frequently is that sleep does not have to be perfect to be restorative. Consistency matters more than perfection. A regular bedtime, a regular wake time, morning light exposure, and daily movement often have a greater impact than chasing the perfect sleep routine.

What About Sleep Trackers?

Many women wear devices such as the Oura Ring, Apple Watch, Garmin, Fitbit, or Whoop to monitor their sleep. These devices can provide useful information and help identify patterns over time. They may help you recognize frequent nighttime awakenings, the effects of alcohol on sleep, changes related to stress, or how travel impacts recovery.

However, I encourage women to view sleep trackers as tools, not report cards. Exercise physiologist and menopause expert Stacy Sims frequently reminds women not to become overly attached to sleep scores. While wearable devices can provide valuable information, they are not directly measuring sleep. Instead, they estimate sleep stages using movement, heart rate, heart rate variability, temperature, and other physiologic markers.

More importantly, how you feel matters. If your tracker reports a poor night of sleep but you wake up feeling rested, energetic, and mentally sharp, trust your body. Likewise, if your tracker gives you an excellent sleep score but you wake up exhausted and struggling to function, that information matters too. Some women develop what sleep experts call orthosomnia, which is anxiety surrounding sleep tracking data. They become so focused on achieving perfect sleep metrics that checking their sleep score becomes a source of stress rather than insight.

I often remind patients that sleep trackers do not know whether you are going through perimenopause, caring for aging parents, navigating a stressful season at work, or waking because of hot flashes. They provide data, but they do not tell the whole story. The goal is not perfect sleep metrics. The goal is restorative sleep that allows you to feel and function well. Use sleep trackers to identify trends, not to judge yourself.

The 20-Minute Rule

If you have been lying awake for about twenty minutes, get out of bed. Keep the lights dim and do something relaxing. Read a book, listen to calming music, pray, meditate, or practice gentle breathing exercises. Return to bed when you feel sleepy again. This helps prevent your brain from associating your bed with frustration, worry, and wakefulness.

When Lifestyle Changes Are Not Enough

For some women, lifestyle changes alone are not enough. Menopausal hormone therapy can improve sleep by addressing hot flashes, night sweats, mood changes, and temperature dysregulation. Micronized progesterone may be particularly helpful because of its calming effects on the brain.

Cognitive Behavioral Therapy for Insomnia, often called CBT-I, remains the gold standard treatment for chronic insomnia. It helps retrain the brain's relationship with sleep and often provides long-lasting benefits. For women who do not have access to a sleep specialist, digital CBT-I programs and apps may be worth exploring.

Gabapentin may help women experiencing both hot flashes and sleep disruption. Fezolinetant (Veozah) may improve sleep by reducing nighttime hot flashes.

Newer medications known as dual orexin receptor antagonists, including Quviviq and Dayvigo, work by targeting the brain's wakefulness system and may help maintain sleep while preserving more natural sleep architecture.

Supplements That May Help Some Women

Many women ask about supplements. While some women find certain supplements helpful, supplements are unlikely to overcome untreated sleep apnea, significant hot flashes, restless legs syndrome, chronic insomnia, or other underlying causes of poor sleep. I generally view supplements as supportive tools rather than primary treatments. The goal is not to take every supplement available. The goal is to understand why you are not sleeping and choose tools that support the underlying issue.

Magnesium glycinate is one of the supplements I discuss most often with patients. It may support relaxation, reduce muscle tension, and improve sleep quality in some individuals. It is generally well absorbed and gentle on the stomach.

Melatonin helps regulate the body's internal clock. It is most helpful for sleep timing issues, jet lag, shift work, or circadian rhythm disruptions. It is not a traditional sleeping pill, and lower doses often work better than higher doses.

L-theanine may help promote relaxation without causing sedation. Some women find it helpful when mental overstimulation or racing thoughts interfere with sleep.

Glycine: Emerging research suggests glycine may support sleep quality and help the body initiate sleep by promoting a slight reduction in core body temperature.

Ashwagandha has shown some promise for stress reduction and sleep quality in small studies, but more research is needed and long-term safety data remain limited.

Tart cherry concentrate contains small amounts of melatonin and antioxidant compounds that may modestly improve sleep duration and sleep quality in some individuals.

Valerian root has been used for centuries to promote relaxation and sleep. Some women find it helpful, although research results have been mixed and benefits appear modest.

Again, no supplement can replace addressing the underlying cause of poor sleep. 

The Bottom Line

If there is one thing I hope you take away from this article, it is that you are not failing at sleep. Your body is changing. Hormones, metabolism, stress, circadian rhythms, and aging are all playing a part and make sleep so much more difficult.

If you are struggling with sleep right now, please know this is not a sign of weakness, lack of discipline, or something you are doing wrong. Sleep disturbances are one of the most common and frustrating symptoms of the menopause transition, and there are solutions.

The goal is not simply to take a sleeping pill and hope for the best. The goal is to understand what is causing the disruption and address the root causes whenever possible. Sleep affects everything. It affects your mood, your metabolism, your memory, your heart health, your bone health, your relationships, and your overall quality of life.

You deserve to wake up feeling rested. And if you are not, it is worth exploring why.