What Are the Causes of Snoring? A Comprehensive Guide

Snoring, that familiar hoarse or harsh sound during sleep, arises when air passes over relaxed tissues in your throat, causing them to vibrate. While occasional snoring is common, chronic snoring can disrupt sleep and sometimes indicate underlying health issues. Understanding the causes of snoring is the first step toward finding effective solutions.

Symptoms of Snoring

Snoring is often linked to obstructive sleep apnea (OSA), a sleep disorder where breathing repeatedly stops and starts. It’s crucial to consult a doctor if snoring is accompanied by the following symptoms, as they may point to OSA:

Breathing pauses observed during sleep
Excessive sleepiness during the day
Difficulty concentrating
Morning headaches
Sore throat upon waking
Restless sleep
Gasping or choking sensations at night
High blood pressure
Chest pain at night
Snoring loud enough to disturb a partner’s sleep
In children: poor attention span, behavioral problems, or academic difficulties

OSA is typically characterized by loud snoring followed by periods of silence where breathing stops or becomes shallow. These pauses in breathing can trigger awakenings accompanied by loud snorts or gasping sounds. Individuals with OSA may experience these breathing disruptions numerous times throughout the night, leading to fragmented and non-restorative sleep. Obstructive sleep apnea is diagnosed when these episodes occur at least five times per hour of sleep.

When to Seek Medical Advice

If you or your child experience any of the symptoms listed above, it’s important to consult a doctor or pediatrician. These symptoms could indicate OSA or other underlying conditions that require medical attention.

Common Causes of Snoring

Anatomy of the airway showing how a narrowed passage can lead to snoring.

Snoring arises from the vibration of relaxed tissues in the airway during breathing. Several factors can contribute to this tissue vibration and subsequent snoring.

Relaxed Throat Muscles: During sleep, the muscles in the soft palate, tongue, and throat relax. This relaxation can cause the tissues to sag and partially obstruct the airway. The narrower the airway becomes, the faster the airflow, leading to increased vibration and louder snoring.
Mouth Anatomy: The physical structure of your mouth can play a role in snoring. A low, thick soft palate can narrow the airway, increasing the likelihood of snoring. Similarly, individuals who are overweight may have excess tissue in the back of their throats, further constricting the airway. An elongated uvula, the triangular piece of tissue hanging from the soft palate, can also contribute to snoring by obstructing airflow and increasing vibration.
Alcohol Consumption: Consuming alcohol before bedtime can exacerbate snoring. Alcohol acts as a muscle relaxant, causing the throat muscles to relax even further and increasing the risk of airway obstruction.
Nasal Congestion: Chronic nasal congestion, whether due to allergies, colds, or a deviated nasal septum, can contribute to snoring. Nasal congestion forces individuals to breathe through their mouths, which increases the likelihood of snoring. A deviated septum, a condition where the partition between the nostrils is crooked, can also restrict airflow and contribute to snoring.
Sleep Deprivation: Lack of sleep can contribute to snoring by causing further relaxation of the throat muscles. When you are sleep-deprived, your body tries to compensate by relaxing more during sleep, which can worsen snoring.
Sleep Position: Snoring is often most pronounced when sleeping on the back. In this position, gravity pulls the tongue and soft tissues of the throat downward, narrowing the airway and increasing the likelihood of snoring.

Risk Factors for Snoring

Several risk factors can increase the likelihood of snoring:

Male Gender: Men are more likely to snore than women, possibly due to anatomical differences in the airway.
Overweight or Obesity: Excess weight, particularly around the neck, can contribute to snoring by narrowing the airway.
Narrow Airway: Individuals with a naturally narrow airway, a long soft palate, or enlarged tonsils or adenoids are more prone to snoring.
Alcohol Consumption: As mentioned earlier, alcohol relaxes throat muscles and increases the risk of snoring.
Nasal Problems: Structural abnormalities in the airway, such as a deviated septum, or chronic nasal congestion can increase the risk of snoring.
Family History: A family history of snoring or obstructive sleep apnea can increase your risk of developing these conditions.

Potential Complications of Snoring

Habitual snoring can have implications beyond simply disturbing a bed partner’s sleep. If snoring is associated with OSA, it can increase the risk of various health complications:

Daytime sleepiness: Disrupted sleep due to snoring and OSA can lead to excessive daytime sleepiness, impacting concentration, productivity, and overall quality of life.
Difficulty concentrating: Sleep deprivation from snoring can impair cognitive function and make it difficult to focus.
Increased risk of high blood pressure, heart conditions, and stroke: OSA is linked to increased blood pressure and cardiovascular problems.
Increased risk of behavior problems in children: In children with OSA, snoring can contribute to behavioral issues, aggression, and learning difficulties.
Increased risk of motor vehicle accidents: Sleepiness caused by snoring and OSA can impair driving ability and increase the risk of accidents.

Conclusion

Understanding the causes and risk factors associated with snoring is vital for addressing this common issue. By identifying the underlying factors contributing to your snoring, you can take proactive steps to alleviate the condition and improve your overall sleep quality and health. Lifestyle modifications, such as weight loss, avoiding alcohol before bed, and changing sleep positions, can often reduce snoring. If snoring persists or is accompanied by symptoms of OSA, it is essential to consult a healthcare professional for evaluation and treatment.

References

Flint PW, et al. Sleep apnea and sleep disorders. In: Cummings Otolaryngology: Head & Neck Surgery. 6th ed. Philadelphia, Pa.: Saunders Elsevier; 2015.
Rowley JA. Snoring in adults.
Berry RB, et al. Obstructive sleep apnea in adults: Epidemiology and variants. In: Sleep Medicine Pearls. 3rd ed. Philadelphia, Pa.: Saunders Elsevier; 2015.
Snoring and sleep apnea. American Academy of Otolaryngology — Head and Neck Surgery.
Ferri FF. Sleep apnea. In: Ferri’s Clinical Advisor 2018. Philadelphia, Pa.: Elsevier; 2018.
Oral appliance therapy. American Academy of Dental Sleep Medicine.
Continuous positive airway pressure (CPAP). American Academy of Otolaryngology — Head and Neck Surgery.
How much sleep do I need? Centers for Disease Control and Prevention.
Riggin EA. Allscripts EPSi. Mayo Clinic, Rochester, Minn. July 19, 2017.
Olson EJ (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 13, 2017.