What Is Snoring?

Common Condition May Have Diverse Causes, Disruptive Consequences

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Snoring may be a familiar companion, but just what is snoring and what are the causes and consequences? By understanding some of its basic features you may discover ways to eliminate its presence, especially if it is bothersome to your sleep or the sleep of your loved ones.

What Is Snoring?

Snoring is quite simply the sound produced during sleep by the vibration of the soft tissues in the upper airway, including the nose and throat.

It typically happens when a breath is drawn in, but may also occur when breathing out. Snoring occurs occasionally in nearly everyone, yet many people snore chronically. In people 30 to 60 years old, 44 percent of men and 28 percent of women habitually snore.

What Are the Causes of Snoring?

When snoring is present, it suggests that the nose or throat may be partially obstructed. This obstruction leads to difficulties moving air. As a result, the air moves turbulently through the airway and this causes the vibration and sound of snoring. If the airway becomes completely blocked the result is obstructive sleep apnea. Even partial obstructions may lead to hypopneas or upper airway resistance syndrome (UARS), which are milder forms of sleep apnea.

Snoring is associated with other common conditions, including:

  • Obesity
  • Nasal congestion
  • Hypothyroidism
  • Acromegaly
  • Enlarged tonsils or adenoids
  • Abnormal facial development

    The Consequences of Snoring

    Mild snoring may have little effect on the quality of your sleep. However, as the airway becomes more obstructed the effort to breathe likewise increases. If breathing is compromised, the oxygen levels within the blood will drop. This may lead to temporary arousals and sleep may thus become disrupted.

    Snoring has been found to increase the risk of narrowing of the blood vessels within the neck, a phenomenon called carotid atherosclerosis. In a study of 110 patients, the more total sleep time spent snoring the higher the risk of developing the narrowing. It is thought that direct vibratory damage of the carotid arteries within the neck may lead to increased plaque formation within these blood vessels.

    Perhaps the biggest problem with snoring (especially when it is loud) is the disruption of the sleep of others, including your bed partner. This may require special sleep arrangements.

    Evaluation and Treatment of Snoring

    As indicated above, snoring is nearly universal and as such it may not necessarily raise any concerns. There are some situations where it should be further evaluated, however. As it is associated with other conditions, these may need to be ruled out to ensure that no other health consequences occur.

    The initial evaluation for snoring may include a visit to your doctor's office.

    It will be important for your bed partner or other family to come along so that they may provide details about your snoring. Any pauses in your breathing at night should be mentioned as these may suggest sleep apnea. If you have restless sleep or have a sense of choking or gasping, this could be important as well. Other associated symptoms with sleep apnea may include:

    In addition, any difficulties related to your sinuses should be evaluated. If you have congestion in your nose, allergies, sinus infections (sinusitis), or a history of sinus surgery this may require further investigation. If you suffer from frequent sore throats or mouth breathing, you may have enlarged tonsils or adenoids. Difficulties with fatigue, weight gain, cold intolerance, and constipation may suggest hypothyroidism.

    A physical examination should include an assessment of the upper airway with measurement of your neck circumference as well as carefully looking at your nose, mouth, and throat. If your doctor suspects you may have sleep apnea, you may need to have a sleep study called a polysomnogram.

    Treatment of snoring is meant to target the underlying condition that is causing you to snore. It may include lifestyle changes such as weight loss or avoiding alcohol before bed, which may relax the airway. Surgery may also be an option, especially if you have a narrow airway because of a deviated septum or enlarged tonsils or adenoids. Regardless, a careful evaluation may provide the reassurance you need to sleep soundly.


    American Academy of Sleep Medicine. "International classification of sleep disorders: Diagnostic and coding manual." 2nd ed. 2005.

    Lee, SA et al. "Heavy snoring as a cause of carotid artery atherosclerosis." Sleep. 2008;31:1207.

    Young, T et al. "The occurrence of sleep-disordered breathing among middle-aged adults." N Engl J Med 1993;328:1230.

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