What’s actually happening
When you fall asleep, the muscles holding your upper airway open relax along with everything else. The airway narrows. Air has to move faster to get through the smaller opening, and the faster it moves, the harder it tugs at the soft tissue at the back of the throat and palate. That tissue vibrates, resulting in the sound we call snoring.
This is why snoring varies so much from night to night. Anything that relaxes those muscles further, narrows the airway more, or pushes you into breathing through your mouth will make it louder.
In many cases that is all it is — noise. Sometimes the narrowing goes past vibration and the airway closes briefly instead, so breathing pauses rather than just getting loud. That is obstructive sleep apnea, and it sits at the far end of the same mechanism.
Six things that make it worse
- Sleeping on your back. Gravity pulls the tongue and soft palate backward into an airway that is already narrower than it is when you’re awake. Side sleeping is the highest-yield change on this list and it costs nothing. If you drift onto your back overnight, a pillow wedged behind your back helps hold the position.
- Alcohol in the evening. Alcohol relaxes airway muscles further than ordinary sleep does, so the airway collapses inward more. Both how much and how late matter — the effect is strongest in the hours right after drinking, so an earlier last drink helps on top of a smaller one.
- A blocked nose. Congestion from allergies, dry air, or a cold pushes you into mouth breathing, which is reliably louder than breathing through your nose. Keeping bedroom air from getting too dry and staying on top of bedding and dust both help.
- Being overtired. This one surprises people. After a run of short nights you sleep more deeply, muscles relax more completely, and snoring gets worse rather than better. Sleep debt makes the next night noisier, not quieter.
- Smoking. Smoke irritates and swells the lining of the airway, which narrows the opening that air has to move through. Evening exposure matters most.
- Weight changes. Tissue around the neck and throat affects how much the airway narrows during sleep, so weight gain will often increase how much someone snores. It’s one factor among several, not the whole story — people of every size snore.
What doesn’t help as much as people hope
- Nasal strips. They can make your nose feel more open, and if congestion really is your problem they take the edge off it. But the vibration that makes the sound is usually further back, in the soft palate and throat. Widening the nostrils doesn’t change what’s flapping.
- Earplugs. Worth having if you’re the one being kept awake, but they solve the listener’s problem. Nothing about the airway changed.
- Stacking extra pillows. Propping just the head tends to bend the neck forward and narrow the airway rather than open it. Raising the whole upper body is a different thing from raising the head.
- Treating it as purely a weight issue. Weight is on the list above for good reason, but position, alcohol, congestion and sleep debt are all doing work too, and three of those four can change tonight.
If you’re the one being kept awake
A lot of people reading this aren’t the snorer. If that’s you, the position change is the one worth asking for — it’s the least intrusive request on the list and it works more often than people expect. Earplugs or steady background sound protect your own night in the meantime. And the overtired factor cuts both ways: broken sleep makes you less able to sleep through noise, which makes the next night harder again.
When to get an expert opinion
Many cases respond to the changes above. If you’ve moved off your back, shifted drinks earlier in the evening, dealt with the congestion and caught up on sleep, and it genuinely hasn’t changed, that’s the point to stop experimenting on your own and get input from a sleep expert.
Sooner than that if someone has noticed you stop breathing or gasp during the night, if you wake up unrefreshed no matter how long you were in bed, or if you find yourself falling asleep during the day.
If it helps to go into that conversation with something concrete, the free sleep apnea screener runs through the eight questions a clinician would ask anyway. It takes about two minutes.