Sleep apnoea in women is consistently under-diagnosed. Not because it is rare — obstructive sleep apnoea affects an estimated 2 to 5 per cent of pre-menopausal women and rises significantly after menopause — but because it looks different in women, and clinical tools were largely developed on male populations.
The picture most people associate with sleep apnoea is a middle-aged man who snores loudly, stops breathing visibly, and is clearly sleepy during the day. That presentation exists, but it describes a male pattern. Women with OSA are more likely to complain of fatigue, poor mood, insomnia, and cognitive fog — symptoms that prompt investigations for depression, anaemia, and thyroid dysfunction before sleep is ever considered.
The result is a diagnostic gap that can span years. Women with undiagnosed sleep apnoea are significantly more likely to have received a mental health diagnosis first. Many will have tried antidepressants, sleeping tablets, or HRT before the underlying cause of their symptoms was ever identified.
If any of the following are familiar, sleep apnoea is worth adding to the list of things worth ruling out.
Persistent exhaustion that sleep does not fix
Fatigue is the most common reason women with sleep apnoea present to their GP, and it is also the reason they are so frequently misdiagnosed. Where men more often describe feeling sleepy, women describe feeling exhausted. The distinction matters clinically: exhaustion is more likely to trigger investigations for anaemia, thyroid dysfunction, or depression before sleep is considered. If you feel deeply tired on a consistent basis despite sleeping for an adequate number of hours, and other investigations have come back normal, sleep quality is worth investigating.
Depression or anxiety that is not fully responding to treatment
Sleep apnoea is an established but under-recognised driver of low mood, anxiety, and emotional dysregulation. Women with undiagnosed OSA are significantly more likely to receive a mental health diagnosis first. In some cases, antidepressants are prescribed and provide partial relief without addressing the underlying cause. If you have been treated for depression or anxiety for months or years and your symptoms remain stubborn or incomplete, disrupted sleep architecture from apnoea events is a credible contributing factor.
Difficulty falling asleep, staying asleep, or waking too early
Women with sleep apnoea are more likely to present with insomnia symptoms than men. Rather than the classic picture of a heavily snoring man who falls asleep instantly, many women with OSA describe lying awake, waking repeatedly in the night, or waking early feeling unrefreshed. This is partly because women's apnoea events tend to be shorter in duration and cause lighter, more frequent arousals rather than obvious gasping. The result is a pattern that looks more like insomnia than obstructed breathing.
Waking with a headache most mornings
Morning headaches caused by overnight drops in blood oxygen are a recognised feature of sleep apnoea in both sexes, but women are more likely to present with this as a primary complaint rather than snoring or witnessed apnoeas. The headaches are typically dull, felt across both sides of the head, and resolve within one to two hours of getting up. If this is a regular pattern, particularly alongside fatigue or disturbed sleep, it warrants investigation.
You snore, but only lightly, or only sometimes
Women with sleep apnoea often snore more quietly than men, or only in certain positions or circumstances, such as after alcohol or when congested. A partner may not notice or may not raise it. Women are also more likely to sleep alone, meaning witnessed apnoeas are less frequently reported. The absence of obvious loud snoring does not rule out obstructive sleep apnoea. A significant number of women with confirmed OSA report no snoring at all.
Restless, unrefreshing sleep and frequent night waking
Many women with sleep apnoea describe their sleep as light, fragmented, or restless rather than recognising it as disordered breathing. Waking multiple times a night, frequently repositioning, or feeling as though you never reach a deep sleep are consistent with the pattern of micro-arousals caused by repeated airway obstruction. These episodes are often attributed to anxiety, bladder urgency, or perimenopause rather than a primary sleep disorder.
Hot flushes or night sweats that are unusually severe or unresponsive
There is a well-documented overlap between obstructive sleep apnoea and vasomotor menopausal symptoms. Women with untreated OSA report more severe and more frequent hot flushes than those without, and HRT provides less relief than expected when sleep apnoea is the concurrent driver. If you are perimenopausal or postmenopausal and your vasomotor symptoms are disproportionate or poorly controlled, the possibility of coexisting sleep apnoea is worth raising with a clinician.
Cognitive symptoms: brain fog, poor memory, difficulty concentrating
Women with undiagnosed sleep apnoea commonly report difficulty concentrating, reduced mental sharpness, poor short-term memory, and a general sense of cognitive slowing. These symptoms are almost universally attributed to other causes: stress, burnout, perimenopause, or simply being busy. They are also consistently documented in sleep apnoea research and typically improve with treatment. If cognitive symptoms have appeared gradually and other causes have been excluded, sleep quality is worth investigating.
Waking with a dry mouth or sore throat
Airway obstruction during sleep causes a shift from nasal to mouth breathing. Waking with a consistently dry or sore mouth is a useful indicator of nighttime obstruction, particularly alongside other symptoms on this list. In women, this symptom is sometimes attributed to medications (antihistamines, antidepressants) without sleep apnoea being considered as a concurrent or primary cause.
High blood pressure, hypothyroidism, or PCOS that is difficult to control
Sleep apnoea is a well-established secondary cause of hypertension and has a documented association with hypothyroidism and polycystic ovary syndrome (PCOS). Women with any of these conditions have a significantly elevated risk of OSA. If blood pressure remains elevated on medication, thyroid levels remain unstable, or PCOS symptoms are poorly controlled, a sleep assessment is clinically appropriate. Treating the sleep apnoea often improves the management of these coexisting conditions.
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Learn about home sleep testingThe menopause connection
Oestrogen and progesterone both have protective effects on upper airway muscle tone, which is one reason pre-menopausal women have a lower risk of obstructive sleep apnoea than men of the same age. After menopause, this protection falls away. The risk of OSA in postmenopausal women is approximately three times higher than in pre-menopausal women, bringing it broadly in line with male risk at the same age.
The perimenopause transition can also trigger or worsen sleep apnoea before menopause is complete. Women in their mid-to-late forties who develop new sleep difficulties, unexplained fatigue, or worsening mood changes alongside hot flushes may be experiencing the effects of both hormonal transition and emerging sleep disordered breathing simultaneously. These overlap enough that one can mask the other.
Women with polycystic ovary syndrome (PCOS) are also at elevated risk at any age, due to higher androgen levels, which reduce airway muscle tone in a pattern similar to the male hormonal profile.
Why the diagnosis is so often missed
The standard sleep apnoea screening tools, including the STOP-BANG questionnaire used in most clinical settings, were validated primarily in male populations. They assign points for factors more common in men: neck circumference above 40cm, BMI above 35, loud snoring, and witnessed apnoeas. Women frequently do not score highly on these criteria even when they have significant OSA, because their snoring is quieter, their apnoea events are shorter, and their neck circumference and BMI may fall below the male-derived thresholds.
Women are also less likely to have a bed partner who reports witnessed apnoeas, either because they live alone, because their partner is a heavier sleeper, or because their apnoea events are less dramatic than the classic gasping pattern.
The combined effect is that a woman presenting to her GP with fatigue, poor sleep, low mood, and morning headaches is far more likely to leave with a referral for thyroid bloods, an antidepressant prescription, or a discussion about perimenopause than with a sleep study referral. All of those investigations may be appropriate. Sleep apnoea should be part of the same conversation.
A note on this article
This article is a clinician-written guide to symptoms, not a diagnostic tool. A formal diagnosis of obstructive sleep apnoea requires an overnight sleep study interpreted by a qualified clinician. The symptoms described here overlap with a number of other conditions. If you have significant or persistent symptoms, please speak to your GP or arrange a private assessment.