Issue 022

Sleep that stopped being sleep: why you wake up tired when your hormones are out of balance

Yvette Rose · 8 min read

You are in bed for eight hours and you wake up as if you had not been. It is one of the most common things a woman with a hormonal imbalance tells me. She is told to try melatonin, or that it is just her age. Whether it is perimenopause, PCOS or menopause, sleep that stopped working has at least five separate causes, they feel different from the inside, they each need a different fix, and almost nobody looks at all of them at once. Your job this month is to work out which one is yours.

What changes when your hormones shift

Progesterone goes first. In the years before the final period, more cycles pass without ovulation, and a cycle without ovulation makes almost no progesterone. Progesterone matters for sleep because one of its breakdown products acts on the same calming receptors in the brain that sleep medications use. When it falls, sleep gets lighter and the wakings get longer. Then estrogen begins to swing, and estrogen helps regulate body temperature, which is where hot flashes come from. In PCOS the same thing happens by a different road. Cycles without ovulation make almost no progesterone either, and the high insulin behind PCOS raises the risk of sleep apnea on its own. Somewhere between sixteen and forty seven percent of women in perimenopause report sleep problems, rising to somewhere between thirty five and sixty percent after menopause, and women with PCOS report poor sleep far more often than women without it.

That is the hormone layer, and it is real. The women I see usually have two or three of the causes below stacked on top of it, and treating one leaves the others standing.

Five reasons your sleep stopped working, and how to tell them apart

If you wake hot, sweating, or a few seconds before a wave of heat, that is a hot flash, even when it is mild enough that you never called it one. Hormone therapy is the most effective treatment for hot flashes, and that is a conversation for a menopause trained doctor. There are now two non hormonal options as well, fezolinetant and elinzanetant, and in the elinzanetant trials women also reported better sleep.

If you fall asleep the second your head hits the pillow and then wake in the second half of the night wired, mind racing, heart going, and cannot get back, that is usually cortisol. You fell asleep because you were exhausted. You woke because a nervous system that never stands down keeps cortisol available in case you need to run. I wrote about this in Issue 019. The fix is the nervous system, and it takes longer than a supplement.

If you wake hungry, shaky, or with your heart pounding, especially after wine or dessert, that is blood sugar. Alcohol drops blood sugar a few hours after you drink it and fragments the second half of the night. A carbohydrate heavy dinner does something similar. The body's answer to falling glucose is adrenaline, and adrenaline wakes you up.

If your legs crawl, twitch, or need to move when you lie down, that is restless legs until proven otherwise, and restless legs is an iron story. The current American sleep medicine guideline recommends iron treatment when ferritin is under 75, and it now recommends against the dopamine drugs that used to be handed out first. Most women I meet with restless legs were told their ferritin of 15 was normal. Issue 013 is about that number.

If you wake unrefreshed no matter what, get morning headaches, get up to pee more than once, and your mood has dropped, I want you to ask about sleep apnea, and I want you to ask even if you do not snore. In women, apnea looks like insomnia and low mood far more often than it looks like the classic picture, and that delays the diagnosis by years. Estrogen is protective, so the risk more than doubles after menopause, and it is much more common in women with PCOS, and not only in those carrying extra weight. Around one in ten American women has it and most do not know.

There is a sixth, quieter cause. Thyroid in either direction. Overactive, or overtreated, and you cannot get to sleep. Underactive and you sleep and it does nothing. A TSH alone will not tell you which. Issue 011 explains what to ask for.

Why the sleep hygiene list stopped working

You have read the list. Dark room, no screens, no caffeine after two. The list is right, and it is the habit layer, and most of what I just described is biology. A cool room does nothing for restless legs.

What does have good evidence is CBT for insomnia, a short structured program that retrains how your brain treats the bed. It is the first line treatment for chronic insomnia in every major guideline, and it has been tested specifically in women with hot flashes and found to work, including by phone. Melatonin has modest evidence at low doses and it is a timing tool more than a sleeping pill. Magnesium has modest evidence for sleep quality and I do not mind it at ordinary doses, with the caveat below. Alcohol is the worst sleep aid ever invented. It puts you under and then wakes you three hours later. Caffeine has a half life of around five hours, so the coffee at three is still half in you at eight.

Eight hours in bed is not eight hours of sleep, and your body knows the difference.

What I would do first

Keep a two week sleep log before you change anything. Bedtime, every waking and what woke you, whether you were hot, hungry, wired, or your legs were moving, alcohol, what you ate for dinner and when, and the time of your last coffee. Two weeks of that tells you which of the five you are dealing with.

Fix your wake time first, seven days a week. The body sets its clock from the morning.

Put thirty grams of protein at dinner and take the alcohol out for two weeks. Then read your log. If the wakings in the second half of the night went quiet, you have your answer.

Get the room to somewhere between 65 and 68 degrees and sleep with less on.

Finish caffeine by noon.

Give the nervous system the same fifteen minutes every night. A body that never stands down needs to be told that it is allowed to, and it learns by repetition.

Lift twice a week. Strength training improves sleep in trials, and I wrote about how to start when you are exhausted in Issue 021.

Get the panel: ferritin, a full thyroid panel with antibodies, fasting insulin with fasting glucose, HbA1c, high sensitivity CRP and vitamin D.

When to push harder with your doctor

Most of the above is safe for anyone. There are exceptions and they matter.

If you are pregnant, broken sleep is expected, restless legs are common because iron demand goes up, and this is a conversation with your midwife before any supplement, including melatonin. If you take thyroid medication and you cannot get to sleep or your heart races at night, ask whether your dose is too high, and ask for the full panel. If you take a blood thinner, check every supplement with your clinic first, because some, including melatonin, can interact. If you take medication for diabetes, waking sweaty and shaky in the night can be a true low blood sugar, and that is urgent, so tell whoever prescribes it before you change your dinner. If you have a history of disordered eating, sleep logs and dinner rules can become one more thing to control, so say so and get support for setting this up.

Push harder if you snore, someone has seen you stop breathing, you wake with headaches, or your blood pressure has crept up. Ask for a sleep study and do not accept "you are not the type." Push harder if your legs move at night and your ferritin is under 75. Push harder if hot flashes are wrecking your sleep and nobody has offered you hormone therapy or the non hormonal options by name. And push harder if you have been sleeping eight hours for three months and still wake exhausted. That is a medical question, and it deserves a workup rather than another bottle of something.

I do not diagnose, order tests or treat. I read the log next to the folder and tell you what I see as one picture, and if it needs clinical care I say so and I send you.

FAQ

Why do I wake up tired after eight hours of sleep when my hormones are off?

Because time in bed and sleep are different things. Night sweats, cortisol, blood sugar drops after alcohol, restless legs from low iron and sleep apnea all break sleep into pieces without fully waking you, so you get eight hours of fragments. A two week log of what wakes you, and a panel that includes ferritin and a full thyroid, usually shows which one it is.

Does progesterone help with sleep?

It can. One of progesterone's breakdown products acts on the same calming brain receptors as sleep medication, and in studies oral micronized progesterone improves sleep for some women as part of hormone therapy. Whether it is right for you depends on your history, and it is a conversation with a menopause trained doctor, never a thing to buy online.

Can low iron cause bad sleep?

Yes. Low ferritin is the most common driver of restless legs, and restless legs fragments sleep all night. The current sleep medicine guideline recommends iron treatment when ferritin is under 75, which is far above the number most labs flag. If your legs move at night, ask for ferritin and ask what the number was.

Do I need a sleep study?

Ask for one if you snore, if someone has seen you pause breathing, if you wake with headaches, get up to pee more than once, or wake unrefreshed no matter what you try. In women, sleep apnea often looks like insomnia and low mood rather than snoring, the risk more than doubles after menopause and it is much more common in PCOS. It is treatable, and untreated it raises blood pressure and blood sugar.

Does magnesium help you sleep?

Modestly, for some people, and it will not fix hot flashes, apnea or restless legs. The evidence for magnesium and sleep quality is small and mixed. At ordinary doses it is safe for most adults, and if you have kidney disease or take a blood thinner, check with your doctor first. Treat it as a small help, never the answer.

In good health,
Yvette Rose

Sources

This is general wellness education and not medical advice, diagnosis or treatment. Talk to a qualified professional, especially if you are pregnant, nursing, taking medication or managing a condition.

It all starts in the gut.