Perimenopause fatigue: why you're so tired, and what can help

You wake up tired, even after a full night in bed. By mid-afternoon you hit a wall. Things you used to do without thinking now feel like wading through mud, and you can't remember the last time you felt properly rested.

Perimenopause fatigue is real, and it's one of the most common things women notice. The NHS lists the hormone changes of menopause among the causes of tiredness. Broken sleep, night sweats and low mood often make it worse.

But tiredness has lots of possible causes, and some are easy to treat. So it's worth checking for those too, rather than putting it all down to your age or your hormones.

Does perimenopause make you tired?

Yes, it can. The NHS says hormone changes during the menopause are one of the causes of tiredness and fatigue.

It's also very common. A 2026 study surveyed more than 12,600 women aged 35 and over who used a period-tracking app. Fatigue and physical and mental exhaustion were the most commonly reported symptoms, each reported by 83%. Hot flushes were the symptom most women expected, but tiredness was what most of them were actually living with (Hedges and others, 2026). App users may not be typical of all women, but it's a striking finding.

What does perimenopause tiredness feel like?

It can show up as:

• waking up unrefreshed, however long you've been in bed
• an energy crash in the afternoon
• heavy limbs, or feeling physically drained
• struggling to concentrate or find words (see our guide to menopause brain fog)
• less patience and a shorter fuse
• losing motivation for things you used to enjoy

The NHS explains the difference between ordinary tiredness and fatigue. Fatigue is an overwhelming tiredness that isn't helped by rest and sleep. If that sounds like you, the NHS says to see a GP, because there may be another medical cause.

Why does perimenopause make you so tired?

Usually it's several things at once.

Broken sleep. A review of the research found that insomnia symptoms increase during the menopause transition, especially trouble staying asleep. Hot flushes and night sweats are a key part of this. See our guides to night sweats and waking at 3am.

Hormone changes. The NHS names menopause as one cause of tiredness in its own right. In perimenopause, hormone levels go up and down, and Women's Health Concern says this is often when symptoms are most noticeable.

Low mood and anxiety. The Menopause Charity says low mood in menopause often comes with a loss of motivation and fatigue. The NHS lists lack of energy among the symptoms of depression.

Heavier periods. The NHS says periods can get heavier as you approach menopause. Heavy periods are a very common cause of iron deficiency anaemia, which makes you tired and short of energy.

A very full life. Stress uses up a lot of energy, and midlife often brings work, family and caring all at once.

What else can cause tiredness?

The NHS lists many causes. These are the ones most worth ruling out in your forties and fifties:

Possible cause	Other signs to look out for	How it's checked
Iron deficiency anaemia	Breathlessness, noticeable heartbeats, paler skin, headaches	A blood test (full blood count)
Underactive thyroid	Feeling cold, weight gain, constipation, low mood, dry skin or hair, heavy or irregular periods	A blood test
Diabetes	Feeling thirsty all the time, peeing more, losing weight without trying	A blood test
Overactive thyroid	Feeling hot, restlessness, irritability, weight loss, a fast heartbeat	A blood test
Sleep apnoea	Loud snoring, gasping or choking in your sleep	A talk with your GP
Depression	Low mood and little enjoyment most days for 2 weeks or more	A talk with your GP

An underactive thyroid is worth a special mention. The NHS says it's a common condition. Its main cause in the UK, Hashimoto's disease, is most common in women and usually starts between the ages of 30 and 50. Many of its symptoms, such as tiredness, low mood, trouble concentrating and period changes, look a lot like perimenopause.

Some medicines can also make you drowsy. Check the leaflet, and talk to your GP or pharmacist before you stop or change anything.

Do I need a blood test?

It depends on what the test is for.

To diagnose perimenopause: usually not. NICE's menopause guideline (NG23) says that for women aged 45 and over, perimenopause can be diagnosed from symptoms and changes in your periods, without blood tests. Women's Health Concern agrees that symptoms and period changes are the most reliable guide over 45.

To rule out other causes of tiredness: often yes. The NHS says a GP may arrange blood tests to check for anaemia, diabetes or an overactive thyroid. A thyroid blood test also checks for an underactive thyroid. If your tiredness is extreme, new, or doesn't fit, it's reasonable to ask whether these tests are right for you.

What can help with perimenopause fatigue?

These ideas come from the NHS self-help tips for tiredness and its advice on tiredness and fatigue.

Eat little and often. Regular meals and healthy snacks every 3 to 4 hours can keep your energy steadier than a few big meals.

Move a little, even when you don't feel like it. The NHS says regular exercise makes you less tired in the long run, and even a single 15-minute walk can give you a boost. Build up slowly towards 150 minutes of moderate activity a week.

Protect your sleep.

• Go to bed and get up at the same times every day.
• Avoid naps in the day.
• Take time to wind down before bed, and keep screens away for the last hour.
• Keep your bedroom cool, quiet and dark. A cool room helps if you have night sweats, and the NHS also suggests lightweight nightwear.

Watch the caffeine. It can keep working for up to 7 hours, so it can disturb sleep and leave you more tired the next day. If you cut down, do it gradually to avoid headaches.

Go easy on alcohol. A drink may help you drop off, but the NHS says you sleep less deeply afterwards, so you wake up tired.

Drink enough water. Sometimes tiredness is simply mild dehydration.

Make room for rest. The NHS suggests building relaxing activities into your day, such as yoga, music, reading or seeing friends.

Treatments to talk to your GP about

• Treating the cause. If a test finds anaemia or a thyroid problem, your GP will talk you through treatment, such as iron tablets or thyroid hormone tablets.
• HRT. NICE says doctors should offer HRT for hot flushes and night sweats. The review above found that hormone therapy can improve how well women feel they sleep, especially when hot flushes are part of the problem.
• Menopause-specific CBT. NICE says this can be considered for sleep problems, such as night-time waking, that come with hot flushes and night sweats. The NHS also says there's some evidence that talking therapies may help with tiredness caused by stress, anxiety or low mood.

If you take any medicine, please don't stop or change it without talking to your GP or pharmacist first.

When to see your GP

Book an appointment if:

• you've been tired for a few weeks and don't know why
• rest and sleep don't help
• tiredness is affecting your work, family or daily life
• you have other symptoms, such as weight loss, heavy periods, feeling very thirsty or mood changes
• you've been told you snore loudly or stop breathing in your sleep

Where relaxation fits in

When broken nights are a big part of your tiredness, a calmer bedtime can be one small piece of the picture. Our menopause sleep hypnosis, Deep Sleep Through the Change, is a bedtime recording to help you let go of the day, stop trying so hard and drift off. You play it in bed with the lights off, and the voice simply fades away at the end. It's a relaxation recording, not a treatment, and it doesn't replace advice from your GP.

You may also find these pages useful: perimenopause period changes, perimenopause depression, menopause mood swings and menopause insomnia.

This page is general information, not medical advice. If you're worried about any symptom, please talk to your GP or pharmacist.

See all perimenopause symptoms