Why Do We Snore? What Makes the Sound and What Raises the Risk

Oct 17, 2026 · 4 min read · Sourced and fact-checked

The short answer: Snoring is the sound of soft tissue vibrating in the upper airway during sleep. Reviews in Deutsches Arzteblatt International and Sleep and Breathing explain where the noise comes from, who it affects, and when it needs checking.

Almost everyone knows the sound, but the mechanics are simple physics plus anatomy. A 2019 clinical guideline review in Deutsches Arzteblatt International and a 2020 review in the journal Sleep and Breathing lay out what researchers know about snoring.

Where the sound comes from

Snoring is generated by the vibration of soft tissue in the upper airway during sleep. As air moves in and out past relaxed tissues, especially around the soft palate, the tissues flutter and produce the noise. The nasal skeleton itself is too stable to vibrate, but a blocked or narrow nose can still be a co-factor, because it changes airflow further down the airway.

How common it is

Prevalence figures vary widely, from 2 to 86 percent, because studies use different definitions and often fail to separate simple snoring from obstructive sleep apnea. One set of standardized telephone interviews found regular snoring reported by 20 percent of women and 26 percent of men up to age 24, with the highest frequency between ages 45 and 55. According to the National Sleep Foundation, 90 million Americans report isolated snoring, and 37 million say they snore routinely.

What raises the risk

The Sleep and Breathing review lists clear risk factors: being male, older age, elevated body weight, an impaired nasal passage, an enlarged soft palate, smoking, and alcohol consumption. This is why the guideline's first-line advice for people who want to reduce snoring includes weight loss, avoiding nicotine, changing sleep position, and treating a blocked nose.

Snoring versus sleep apnea

The reviews draw an important line. Isolated snoring is common and, on its own, is currently not considered a disease; it is treated only if the person wants treatment. Obstructive sleep apnea is different: it involves repeated partial or complete collapse of the upper airway and is a confirmed cardiovascular risk factor. The International Classification of Sleep Disorders places isolated snoring under sleep-related breathing disorders but requires it to be separated from apnea, using a home sleep test or a lab sleep study when needed.

What can be done

The guideline reviews the evidence for treatment. Recommended conservative options include positional therapy and weight loss, and mandibular advancement splints can lessen snoring in suitable cases. When nasal breathing is impaired, treating the nose is recommended. For certain anatomical features of the soft palate, minimally invasive surgery can be considered. The authors caution that the overall evidence is limited, as most studies are small with short follow-up.

A note

Loud snoring with witnessed pauses in breathing, gasping, or strong daytime sleepiness should be checked by a doctor, since those point toward sleep apnea. This is general information, not medical advice.

Sources

The Diagnosis and Treatment of Snoring in Adults (clinical practice guideline review), Stuck and Hofauer, Deutsches Arzteblatt International, November 2019: https://pmc.ncbi.nlm.nih.gov/articles/PMC6947688/
Diagnosis and treatment of isolated snoring: open questions and areas for future research, Sleep and Breathing, 2020: https://pmc.ncbi.nlm.nih.gov/articles/PMC8195801/

Facts checked: October 17, 2026.