What causes snoring?
Snoring happens when air cannot flow freely through the nose and throat during sleep. As you fall asleep, the muscles of the mouth, tongue and throat relax; if they relax enough to partly narrow the airway, the passing air makes the surrounding soft tissues vibrate, producing the familiar snoring sound. The narrower or more relaxed the airway, the louder the snoring tends to be. It is extremely common and, on its own, often harmless.
Many factors make snoring more likely. Being overweight adds tissue around the neck and throat that narrows the airway. Sleeping on your back lets the tongue and soft palate fall back and obstruct airflow. Alcohol and sedatives relax the throat muscles further. A blocked nose from a cold, allergies or nasal problems forces mouth breathing and increases snoring. Age, and the natural loss of muscle tone that comes with it, also plays a part.
How to reduce or stop snoring
Many people can reduce their snoring significantly with some practical changes, most of which aim to keep the airway more open during sleep. If you carry extra weight, losing some can make a real difference, as it reduces the tissue crowding the throat. Sleeping on your side rather than your back keeps the tongue from falling backwards — some people sew a tennis ball into the back of a nightshirt, or use a body pillow, to help stay off their back.
Cutting down on alcohol, especially in the hours before bed, and avoiding sedatives where possible, reduces the throat-muscle relaxation that worsens snoring. If a blocked nose is the problem, treating the congestion — with saline sprays, treating allergies, or nasal strips that hold the nostrils open — can help. Keeping a regular sleep routine and staying well rested also helps, as overtiredness deepens muscle relaxation. Stopping smoking reduces the airway irritation that contributes to snoring.
Simple snoring versus sleep apnoea
The most important thing to understand about snoring is the distinction between simple (harmless) snoring and snoring that is a sign of obstructive sleep apnoea, a condition where the airway repeatedly closes during sleep, briefly interrupting breathing. Simple snoring is just noise, without pauses in breathing, and while it may disturb a partner, it does not usually affect health. Sleep apnoea, by contrast, is a medical condition that needs assessment and treatment.
The key warning signs that snoring may be sleep apnoea are pauses in breathing during sleep (often noticed by a partner), gasping or choking sounds, and waking unrefreshed with excessive daytime sleepiness despite a full night in bed. Other clues include morning headaches, poor concentration, and irritability. Because untreated sleep apnoea is linked to health risks such as high blood pressure, recognising these signs and seeking assessment matters.
Why sleep apnoea matters
Obstructive sleep apnoea is worth taking seriously because the repeated interruptions to breathing fragment sleep and reduce oxygen levels through the night, even if the person is not fully aware of waking. Over time, this can leave people persistently tired and unrefreshed, affecting concentration, mood, and daytime functioning — including a higher risk of accidents from drowsiness, for example while driving. It is a genuinely important condition to identify.
Beyond daytime tiredness, untreated sleep apnoea is associated with longer-term health risks, including high blood pressure and heart problems, which is why diagnosis and treatment are beneficial. The good news is that sleep apnoea is very treatable. Effective options range from lifestyle measures and devices that keep the airway open during sleep (such as CPAP machines or mandibular advancement devices) to treating contributing factors. A doctor can arrange the sleep assessment needed to diagnose it.
When to see a doctor about snoring
Simple snoring without other symptoms does not usually need medical attention, though it is worth trying the self-help measures if it disturbs your sleep or your partner's. You should see a doctor, however, if there are any signs suggesting sleep apnoea: pauses in breathing during sleep, gasping or choking, waking unrefreshed, or excessive daytime sleepiness. A partner's observation of breathing pauses is a particularly important reason to seek assessment.
It is also worth seeing a doctor if snoring has started or worsened suddenly, if it is affecting your relationship or wellbeing, or if self-help measures have not helped. Assessment may involve questions about your sleep and, where sleep apnoea is suspected, a sleep study to measure your breathing overnight. Because effective treatments exist for both troublesome snoring and sleep apnoea, seeking help is worthwhile rather than simply putting up with it.