Sleep Apnoea in Women Looks Nothing Like the Textbook

The textbook description of obstructive sleep apnoea is a middle-aged, overweight man who snores loudly, stops breathing in his sleep, and falls asleep in front of the television. His partner has noticed and made him come.

That picture is accurate for a large number of men. It is a poor description of how the condition presents in women, and the consequence is measurable: women are diagnosed later, less often, and only after being investigated for several other things first.

What it actually is

During sleep, the muscles of the throat relax. In obstructive sleep apnoea the airway narrows or closes entirely, breathing stops for ten seconds or more, oxygen falls, and the brain briefly rouses you to reopen the airway.

This can happen dozens of times an hour. You almost never remember any of it — the arousals are too brief to reach conscious memory. What you experience is simply feeling unrested, night after night, for years.

How it presents differently in women

Insomnia rather than sleepiness

This is the most important difference and the one that redirects the whole diagnosis. Men typically report daytime sleepiness. Women more often report insomnia — difficulty getting to sleep, frequent waking, unrefreshing sleep.

A woman describing insomnia is very unlikely to be investigated for a breathing disorder. She is far more likely to be offered sleep hygiene advice, and reasonably so — but if the underlying problem is an airway closing forty times an hour, sleep hygiene will not touch it.

Fatigue, not sleepiness

The distinction is subtle and clinically significant. Sleepiness is the inability to stay awake. Fatigue is exhaustion without necessarily being able to fall asleep. Women more commonly describe the latter, and the standard screening question — do you fall asleep during the day? — misses it entirely.

Morning headaches

Common, distinctive, and rarely connected. A headache on waking that eases over the first hour or two is characteristic, and results from carbon dioxide accumulating overnight.

Low mood and anxiety

Sleep apnoea causes depression and anxiety, and it does so through a physical mechanism. Women with sleep apnoea are frequently treated for depression for years before the sleep is examined. The antidepressant is often prescribed appropriately — but if the fragmented sleep is untreated, response tends to be poor, and poor response is then attributed to treatment-resistant depression.

Palpitations and night sweats

Both are common and both, in a woman in her forties, will usually be attributed to perimenopause first. Sometimes correctly. But the two conditions also overlap heavily, and it is not either/or.

Less snoring, or quieter snoring

Women snore less loudly and have shorter, less complete airway events — hypopnoeas rather than full apnoeas. Since "does anyone say you stop breathing?" is the standard screening question, and the answer is often no, the condition is screened out at the first question.

There is also a reporting asymmetry that is uncomfortable but well documented: partners of men are considerably more likely to report snoring than partners of women.

When risk rises sharply

Menopause is the pivotal moment. Before menopause, sleep apnoea is markedly more common in men. Afterwards, the gap narrows substantially. Progesterone and oestrogen both influence upper-airway muscle tone, and losing them raises risk considerably.

Other factors that matter in women specifically:

• PCOS — associated with a substantially higher rate of sleep apnoea, independent of weight, and very rarely screened for
• Underactive thyroid
• Pregnancy, particularly the third trimester, where it is linked to raised blood pressure and gestational diabetes
• Weight gain, although — importantly — a normal BMI does not exclude it. Airway shape, jaw position and neck anatomy matter, and slim women do have sleep apnoea

Why it is worth pursuing

Untreated sleep apnoea is not simply a sleep-quality issue. It is independently associated with high blood pressure that responds poorly to medication, atrial fibrillation, stroke, type 2 diabetes and a significantly raised risk of road traffic accidents.

Treating it, when it is present, often produces one of the more dramatic improvements in general medicine — people describe feeling a decade younger within weeks.

What to do if this sounds familiar

Record yourself

A phone app that records sound overnight costs nothing and can be genuinely revealing. You may hear snoring you did not know about, or — more tellingly — pauses followed by a gasp. It is not diagnostic, but it is useful evidence, and it is something you can bring rather than something you have to persuade someone of.

Keep a two-week sleep diary

Time to bed, time asleep, number of wakings, time up, and how you felt on waking. Patterns emerge that are invisible night to night.

Ask directly for a sleep study

Say the words: "I would like to be assessed for sleep apnoea." Modern home sleep studies are simple — a device worn overnight in your own bed, no hospital stay involved.

Get the mimics excluded properly

Several conditions produce the same fatigue and are eminently treatable. Thyroid function, ferritin, B12, vitamin D and HbA1c are all worth having. Low iron in particular causes restless legs, which fragments sleep in its own right.

Do not accept "it is just the menopause" as the end of the conversation

It may well be the menopause. It may also be both. Menopausal hormone changes raise sleep apnoea risk — so the two explanations reinforce one another rather than competing.

What treatment involves

CPAP — a mask delivering gently pressurised air — remains the most effective treatment for moderate to severe disease. Modern machines are quiet and the masks are far smaller than their reputation suggests.

Mandibular advancement devices, fitted by a dentist, work well for mild to moderate disease and suit people who cannot tolerate CPAP.

Positional therapy helps where events occur mainly on the back.

Weight loss, where relevant, is genuinely effective — but it is not the whole answer and should not be the only thing offered.

The point

Sleep apnoea in women is not rare. It is under-diagnosed, and it is under-diagnosed because the screening questions were built around how it looks in men.

If you have been exhausted for years, have been told it is stress, hormones or low mood, and nothing has quite worked — this is worth putting on the list.

A GP consultation can review your symptoms, arrange the bloods that exclude the common mimics, and refer you for a home sleep study where it is warranted.