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Medical Professionals

Professional Reference articles are designed for health professionals to use. They are written by UK doctors and based on research evidence, UK and European Guidelines. You may find the Snoring article more useful, or one of our other health articles.

Snoring is noisy breathing caused by vibration of relaxed soft tissues of the nose, soft palate or pharynx whilst sleeping or drowsy.

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  • Snoring affects around 40% of the UK population12.

  • It is more common in men although the ratio in the literature varies.

  • It is most common between the ages of 40-60.

  • Prevalence in children is lower, with rates between 1-20% being quoted in children of school age3. In children it is most commonly due to adenotonsillar enlargement or craniofacial abnormalities. In the preschool age group, prevalence has been reported in one UK-based study as 7.9% for habitual snoring, with atopy and respiratory infections being common causes4. Nearly 60% of the children in this study were reported as having snored at some point in the previous 12 months.


The snoring sound can be generated at one or more levels:

  • In the nose.

  • At the level of the soft palate and uvula.

  • At the level of the pharyngeal wall and tonsils.

  • At the base of the tongue.

There is lack of consistency in definitions used for snoring and sleep-related breathing disorders. However, essentially5:

  • Snoring is the description of the noisy breathing made during sleep.

  • Simple snoring is the presence of snoring without irregular breathing and hypoxia causing daytime sequelae. However, there is evidence that it is not an entirely benign condition and may be associated with cardiovascular morbidity as well as psychological and social problems.

  • Obstructive sleep apnoea/hypopnoea syndrome (OSAHS) is the presence of irregular breathing in the night followed by sleepiness during the daytime6. There is total upper airway collapse, with cessation of airflow for at least 10 seconds, occurring >5 times per hour7. Obstructive sleep apnoea/hypopnoea (OSAH) or obstructive sleep apnoea (OSA) is disrupted irregular breathing without daytime sleepiness. However, these terms are often used interchangeably within the literature.

  • Most people with OSA snore. The prevalence of OSA in people who snore varies widely in the literature from 20-70%, reflecting differences in definition and diagnostic rates8.

  • It may well be that the two conditions are at opposing ends of a continuum.

  • The upper airway resistance syndrome (UARS) has been described as potentially another condition on this spectrum where there are respiratory effort-related arousals during the night, but no associated hypoxia9.

There is a separate article discussing Obstructive Sleep Apnoea Syndrome.

Snoring is not usually due to an underlying disorder, but the following may predispose by causing narrowing of the upper airway:

  • Obesity. There is a strong association between increasing weight and the prevalence of OSA. This association is present but less strong for snoring10. Those with a body mass index (BMI) of over 40 kg/m2 have been calculated to have a 27 times increased risk of OSA.

  • Hypothyroidism.

  • Acromegaly.

  • Nasal congestion, blockage or septal deviation.

  • Enlarged tonsils and adenoids.

  • Craniofacial abnormalities.

Other factors which may make snoring more likely include:

  • Alcohol intake.

  • Sedative medication.

  • Smoking.

  • Supine position.

  • Age (prevalence increases with age generally).

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Cover the following questions:

  • Duration of snoring?

  • Frequency - is it every night?

  • Is snoring more likely in any particular position? (For most people it is worse when they sleep on their back.)

  • Any precipitants/modifiable factors - alcohol, sedatives, a recent increase in weight?

  • Any history of nasal problems/obstruction?

  • Does it disturb the patient's sleep?

  • Does it disturb the partner's sleep? What are the relationship effects?

  • Has the partner noticed any apnoeic episodes?

  • Is there daytime somnolence? When using the Epworth Sleepiness Scale a figure of 10 or more is considered sleepy. This scale has been validated for OSA, which is important to be excluded11.

  • Are there any other symptoms suggestive of OSAHS, including early morning headaches, choking episodes during sleep, accidents, inability to concentrate and irritability?


  • Calculate BMI.

  • Record collar size: neck circumference >43 cm correlates with snoring and OSA2.

  • Perform a good general examination: cardiovascular system, respiratory system and thyroid gland.

  • Note whether the site of obstruction is apparent: nasal (eg, polyps, septal deviation), tongue, tonsils and oropharynx, mandible (retrognathia).

Continue reading below


  • Arrange sleep studies (polysomnography) if OSA is suspected, especially if surgery is contemplated for snoring (see under 'Management', below) as palatal surgery may reduce the options for OSA treatment.

  • Nasendoscopy (awake, sedated and/or asleep) or acoustic analysis of the snoring usually helps to clarify the level of obstruction. It can exclude upper airway tumours and cysts as a rare cause12.

  • Pharyngeal manometry may be appropriate in some cases13.

  • Perform TFTs if hypothyroidism is suspected.


There is limited evidence for all forms of management, both non-surgical and surgical. Ascertaining any cause or predisposing factors will be helpful in improving efficacy of the advice, device or procedure offered.


  • Encourage weight loss as appropriate.

  • Lifestyle advice: more exercise, less alcohol, fewer sedatives, stop smoking.

  • Posture adjustment and sleep position training: for example, a tennis ball taped to the back of pyjamas to stop the patient rolling on to the back. Bed wedges and pillows may also help.

  • Earplugs for the partner14.

  • Decongestants and steroid nasal sprays can help nasal congestion.

  • Devices that splay the nasal alae may help nasal obstruction. Nasal strips and nasal dilators are available commercially. There has not been sufficient research to ascertain if these are beneficial, and if so which type is more effective.

  • For those who snore due to mouth-breathing, chin straps (to keep the mouth closed) or vestibular shields (essentially closing off the mouth and forcing breathing through the nose) may be of benefit.

  • Oral appliances can advance the soft palate, tongue or mandible and therefore open the airway. Mandibular advancement devices may help if snoring is generated from the tongue base or in mouth breathers. These are best fitted by a dentist but choice of device and adequate training of dentists are important for this form of treatment to be effective1516.

  • Continuous positive airway pressure (CPAP) often works well but may not be readily available for those without OSA.

  • Some people find acupressure rings worn on the fingers help. These are advertised commercially, but there are no robust trials into their efficacy.


Those with normal or near-normal BMI do best. The procedure performed depends on the level of obstruction:

Nasal surgery

  • Septoplasty.

  • Polypectomy.

  • Turbinate reduction.

Sometimes the above procedures are carried out in combination.


  • The most frequent surgical treatment for snoring in children but used for those children who also have OSA or recurrent tonsillitis3.

  • Also done in adults where enlarged tonsils are demonstrably the cause of snoring17.

Palatal surgery18

  • Uvulopalatopharyngoplasty (UPPP): involves tonsillectomy, reorientation of the anterior and posterior tonsillar pillars and excision of the uvula and posterior rim of the soft palate.

  • Laser-assisted uvulopalatoplasty (LAUP): a tissue-sparing approach may result in a better outcome19.

  • Radiofrequency electrosurgery: radiofrequency ablation (delivered using an electrode) reduces volume of palatal tissue and makes the remaining palate more dynamically stable. It is an outpatient procedure usually under local anaesthetic. National Institute for Health and Care Excellence (NICE) guidance in 2014 noted lack of evidence for long-term outcomes, but sufficient evidence for short-term efficacy18. NICE suggests that patient selection is important and, if used, there should be arrangements for audit, consent and research. One series following up 29 patients concluded that the procedure produced long-term benefits in one in four patients and that patient selection may be improved by prior electromyography of the palatoglossus muscle20. One systematic research concluded that if soft palate surgery is performed, minimally invasive procedures such as radiofrequency therapy should be preferred13.

  • Soft palate implants: implants are inserted in the soft palate under local anaesthetic with the aim of stiffening the soft palate over weeks, due to fibrosis. NICE guidance in 2007 suggests that this procedure should only be carried out in context of research, due to lack of well-controlled evidence, and it should be reserved for patients who snore but do not have episodes of apnoea or hypopnea21. A subsequent review stated that of 99 patients receiving a soft implant, a reduction in snoring intensity was seen three months following treatment. A random controlled trial had found long-term benefit over a three-year period. Extrusion was a complication. The use of rigid implants conferred no additional benefit13.

Tongue base procedures

  • Tongue base reduction (laser).

  • Mandibular advancement and osteotomy.

Other points

  • Uvulectomy may help patients with a large uvula.

  • Tonsillectomy with adenoidectomy may be helpful in children.

  • Surgery is not usually recommended in patients with both snoring and OSA, except nasal surgery to facilitate CPAP. This is due to lack of evidence and the efficacy of CPAP.


Owing to the variation in the literature of definitions and prevalence rates of snoring and OSA, it is difficult to ascertain the complications which arise from snoring alone. Some term it a benign condition but there is some evidence that it may cause the following complications.


  • Marital/relationship problems.

  • Embarrassment in social situations, staying with friends, holidays.


  • Difficulty concentrating.

  • Anxiety and depression. It is difficult to ascertain how prevalent this is for simple snoring without OSA but there does appear to be some increase in symptoms of anxiety or depression2223.


  • Sleepiness due to sleep disruption.

  • Sleepiness in others being disturbed by snoring.

  • There is evidence that habitual snoring may carry an increased risk of coronary heart disease and stroke24. However it remains contentious whether this applies to snoring alone, or to snoring in the presence of OSA. It appears that those who snore have a higher risk of carotid atherosclerosis than those who do not25.

  • A Korean study found that snoring was an independent risk factor for pre-diabetes and type 2 diabetes26.

  • Effect on safe driving. Patients with OSA who drive should inform the Driver and Vehicle Licensing Agency (DVLA). Full details, including a link to the DVLA guidelines, are available from the separate Obstructive Sleep Apnoea Syndrome article.

Further reading and references

  1. Epidemiological study of snoring from a random survey of 1075 participants; British Snoring and Sleep Apnoea Association
  2. Parker RJ, Hardinge M, Jeffries C; Snoring. BMJ. 2005 Nov 5;331(7524):1063.
  3. Fitzgerald NM, Fitzgerald DA; Managing snoring and obstructive sleep apnoea in childhood. J Paediatr Child Health. 2013 Oct;49(10):800-6. doi: 10.1111/jpc.12421.
  4. Kuehni CE, Strippoli MP, Chauliac ES, et al; Snoring in preschool children: prevalence, severity and risk factors. Eur Respir J. 2008 Feb;31(2):326-33. Epub 2007 Nov 21.
  5. Deary V, Ellis JG, Wilson JA, et al; Simple snoring: Not quite so simple after all? Sleep Med Rev. 2014 May 9. pii: S1087-0792(14)00047-1. doi: 10.1016/j.smrv.2014.04.006.
  6. Obstructive sleep apnoea syndrome; NICE CKS, April 2015 (UK access only)
  7. Lavigne GJ, Herrero Babiloni A, Beetz G, et al; Critical Issues in Dental and Medical Management of Obstructive Sleep Apnea. J Dent Res. 2020 Jan;99(1):26-35. doi: 10.1177/0022034519885644. Epub 2019 Nov 8.
  8. Keropian B, Murphy N; The prevalence of OSA in snorers presenting with various chief complaints: a pilot study. Cranio. 2014 Jul;32(3):217-8. doi: 10.1179/0886963414Z.00000000032. Epub 2014 Apr 14.
  9. Pepin JL, Guillot M, Tamisier R, et al; The upper airway resistance syndrome. Respiration. 2012;83(6):559-66. doi: 10.1159/000335839. Epub 2012 Mar 1.
  10. Wall H, Smith C, Hubbard R; Body mass index and obstructive sleep apnoea in the UK: a cross-sectional study of the over-50s. Prim Care Respir J. 2012 Dec;21(4):371-6. doi: 10.4104/pcrj.2012.00053.
  11. Epworth Sleepiness Scale; British Snoring and Sleep Apnoea Association
  12. Suzuki M, Saigusa H, Chiba S, et al; Prevalence of upper airway tumors and cysts among patients who snore. Ann Otol Rhinol Laryngol. 2007 Nov;116(11):842-6.
  13. Stuck BA, Hofauer B; The Diagnosis and Treatment of Snoring in Adults. Dtsch Arztebl Int. 2019 Nov 29;116(48):817-824. doi: 10.3238/arztebl.2019.0817.
  14. Robertson S, Loughran S, MacKenzie K; Ear protection as a treatment for disruptive snoring: do ear plugs really work? J Laryngol Otol. 2006 May;120(5):381-4.
  15. Ilea A, Timus D, Hopken J, et al; Oral appliance therapy in obstructive sleep apnea and snoring - systematic review and new directions of development. Cranio. 2019 Oct 5:1-12. doi: 10.1080/08869634.2019.1673285.
  16. Church SK, Littlewood SJ, Blance A, et al; Are general dental practitioners effective in the management of non-apnoeic snoring using mandibular advancement appliances? Br Dent J. 2009 Apr 25;206(8):E15; discussion 416-7. Epub 2009 Apr 10.
  17. Reckley LK, Fernandez-Salvador C, Camacho M; The effect of tonsillectomy on obstructive sleep apnea: an overview of systematic reviews. Nat Sci Sleep. 2018 Apr 4;10:105-110. doi: 10.2147/NSS.S127816. eCollection 2018.
  18. Radiofrequency ablation of the soft palate for snoring; NICE Interventional Procedures Guidance, January 2014
  19. Wischhusen J, Qureshi U, Camacho M; Laser-assisted uvulopalatoplasty (LAUP) complications and side effects: a systematic review. Nat Sci Sleep. 2019 May 27;11:59-67. doi: 10.2147/NSS.S178540. eCollection 2019.
  20. Hultcrantz E, Harder L, Loord H, et al; Long-term effects of radiofrequency ablation of the soft palate on snoring. Eur Arch Otorhinolaryngol. 2009 Apr 17.
  21. Soft-palate implants for simple snoring; NICE Interventional Procedures Guidance, November 2007
  22. Douglas N, Young A, Roebuck T, et al; Prevalence of depression in patients referred with snoring and obstructive sleep apnoea. Intern Med J. 2013 Jun;43(6):630-4. doi: 10.1111/imj.12108.
  23. Balsevicius T, Uloza V, Sakalauskas R, et al; Peculiarities of clinical profile of snoring and mild to moderate obstructive sleep apnea-hypopnea syndrome patients. Sleep Breath. 2012 Sep;16(3):835-43. doi: 10.1007/s11325-011-0584-z. Epub 2011 Sep 3.
  24. Li D, Liu D, Wang X, et al; Self-reported habitual snoring and risk of cardiovascular disease and all-cause mortality. Atherosclerosis. 2014 Jul;235(1):189-95. doi: 10.1016/j.atherosclerosis.2014.04.031. Epub 2014 May 6.
  25. Kim J, Pack A, Maislin G, et al; Prospective observation on the association of snoring with subclinical changes in carotid atherosclerosis over four years. Sleep Med. 2014 Jul;15(7):769-75. doi: 10.1016/j.sleep.2014.03.009. Epub 2014 Apr 18.
  26. Cho SMJ, Lee H, Shim JS, et al; Association of Snoring with Prediabetes and Type 2 Diabetes Mellitus: The Cardiovascular and Metabolic Diseases Etiology Research Center Cohort. Diabetes Metab J. 2020 Oct;44(5):687-698. doi: 10.4093/dmj.2019.0128. Epub 2020 Apr 16.

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