Sleep Apnoea: The Signs People Miss for Years

The pattern that should prompt testing is loud snoring, pauses in breathing that someone else has noticed, and daytime sleepiness despite spending enough hours in bed. Obstructive sleep apnoea is common, treatable and widely missed, and the average person carries it for years before anyone puts the pieces together.

What is happening during the night#

The muscles that hold the throat open relax during sleep. If the airway is narrow to begin with, from soft tissue around the neck, jaw shape, large tonsils, or a blocked nose, it can collapse partly or completely. Breathing stops for seconds at a time, oxygen dips, and the brain briefly wakes just enough to reopen the airway. The sleeper does not remember any of this. It can happen dozens of times an hour, every hour, all night.

The result is sleep that looks adequate on paper and behaves like severe sleep deprivation. Each surge of arousal also drives up heart rate and blood pressure, which is why untreated apnoea is linked with hypertension, atrial fibrillation, stroke and type 2 diabetes.

The clues that get overlooked#

Snoring is the famous one, and it is the least reliable, because plenty of people snore harmlessly and plenty of people with apnoea sleep alone.

The most useful question is whether you feel sleepy, not merely tired, during passive moments after a full night in bed. Nodding off in meetings, in front of the television at eight in the evening, or as a passenger in a car is a different symptom from ordinary fatigue.

Other signs cluster around the morning and the night: a headache on waking, a very dry mouth, waking two or three times to pass urine, night sweats, irritability, poor concentration and memory, reduced libido, and blood pressure that stays stubbornly high on treatment. In women, apnoea more often shows up as insomnia, fatigue and low mood, which is one reason diagnosis comes later.

Getting it tested#

A doctor will usually take a history, ask about witnessed pauses, check blood pressure, look at the neck and airway, and score daytime sleepiness with a short questionnaire. Confirmation comes from a sleep study, frequently a home kit worn for one or two nights. Severity is graded by how many breathing events occur per hour of sleep.

What treatment achieves#

CPAP, a machine delivering gently pressurised air through a mask, splints the airway open and is the most effective treatment for moderate and severe disease. It is not glamorous, and the first two weeks is a genuine adjustment, but people who persist often describe the change in their daytime alertness as the most striking thing they have experienced from any treatment. Mandibular advancement devices help milder cases, weight loss reduces severity where weight is a factor, and avoiding evening alcohol makes a measurable difference because it relaxes the airway further.

Where to take this next#

If sleepiness is your main problem, it is worth reading the fuller guide to fixing sleep, which explains how to tell apnoea apart from insomnia. The two often coexist, and treating only one of them leaves people still exhausted.