Snoring: When nighttime noise signals an underlying health problem

Snoring may seem harmless, but it can be a warning sign of underlying health problems that deserve attention. In addition to affecting the sleep quality of the person sleeping nearby, snoring can also directly affect the snorer’s health, ranging from daytime fatigue to serious cardiovascular conditions [2, 3]. So, when does snoring become a medical condition that requires attention?

1. Is snoring a disease? Definition and classification

Snoring is the sound produced by vibrations of the soft tissues in the upper airway when airflow is obstructed during sleep [3, 5]. It is a common phenomenon, particularly among men and people who are overweight [3]. However, the severity and clinical significance of snoring can vary. Snoring is generally classified as primary snoring or pathological snoring.

1.1. Primary snoring

Primary snoring, also known as simple snoring, refers to snoring that is not accompanied by other serious health problems, such as sleep apnea, low blood oxygen levels, or sleep disruption that causes daytime fatigue [5]. This type of snoring generally does not cause medical complications for the person who snores, although it may disturb their bed partner.

1.2. Pathological snoring and obstructive sleep apnea (OSA)

Unlike primary snoring, pathological snoring may indicate a more serious condition, most commonly obstructive sleep apnea (OSA) [2, 5]. OSA is a sleep-related breathing disorder characterized by repeated episodes of apnea or reduced breathing during sleep due to partial or complete obstruction of the upper airway [4].

In people with OSA, snoring is often very loud and interrupted by pauses in breathing, followed by gasping or choking sounds as the person struggles to resume breathing [4]. Without timely diagnosis and treatment, OSA can lead to several serious health complications [2].

2. Causes of snoring

Snoring occurs when airflow through the upper airway encounters an obstruction, causing the soft tissues to vibrate and produce sound [3]. Several factors contribute to this process.

2.1. How snoring develops

During sleep, the muscles of the soft palate, uvula, tongue, and throat relax. In some people, this relaxation causes the soft tissues to sag and narrow the airway [3]. As air passes through this narrowed space, pressure builds up and causes the tissues to vibrate, producing snoring [3, 5].

2.2. Anatomical features of the airway

Certain congenital or acquired structural features of the upper airway can increase the risk of snoring:

An elongated or thickened soft palate and uvula: These tissues may vibrate more readily or obstruct the airway more easily [3].
Enlarged tonsils or adenoids: Particularly in children, enlarged tonsils or adenoids can obstruct the airway and lead to snoring [5].
An enlarged tongue: May press against the airway when lying on the back [5].
A small or recessed lower jaw: Reduces the space behind the tongue [5].
A deviated nasal septum or nasal polyps: Obstruct airflow through the nose, potentially leading to mouth breathing and increasing the likelihood of snoring [5].

2.3. Lifestyle and risk factors

Overweight and obesity: Excess fatty tissue around the neck and throat can narrow the airway [3, 5].
Alcohol consumption or sedative use: These substances excessively relax the throat muscles, increasing the likelihood of airway obstruction [3, 5].
Sleeping position: Sleeping on the back can cause the tongue and soft palate to sag backward and obstruct the airway [3].
Smoking: Irritates the airway lining, causing inflammation and swelling that narrow the airway [5].
Age: As people grow older, muscle tone in the throat decreases, increasing the risk of snoring [5].

2.4. Associated medical conditions

Sinusitis, allergies, and the common cold: These conditions can cause nasal congestion and airway swelling, forcing people to breathe through their mouths and making snoring more likely [5].
Hypothyroidism: May cause swelling of the soft tissues in the throat.

3. Signs that snoring is affecting sleep and health

Recognizing the signs of pathological snoring is important for timely medical evaluation and treatment.

3.1. Nighttime symptoms

Very loud and persistent snoring: Snoring may be irregular and interrupted by unusual pauses [4].
Pauses in breathing, gasping, or choking during sleep: These are characteristic signs of OSA and are often noticed by a bed partner [4].
Waking up suddenly with a choking sensation: This may occur when the brain responds to reduced oxygen levels [4].
Restlessness, difficulty achieving deep sleep, or frequent awakenings during the night.

3.2. Daytime symptoms

Fatigue or excessive daytime sleepiness: Even after sleeping for an adequate number of hours, a person may still feel unrefreshed or fall asleep during everyday activities [4].
Difficulty concentrating and memory problems: Poor sleep quality can impair cognitive function [4].
Morning headaches: Headaches may occur frequently upon waking [4].
Dry mouth or sore throat upon waking: These may result from breathing through the mouth during the night [4].
Mood changes, irritability, or depression.

3.3. Long-term health complications

If pathological snoring, particularly snoring associated with OSA, is left untreated, it may contribute to several serious complications:

High blood pressure (hypertension) [4]: Sleep apnea can cause sudden changes in blood pressure and heart rate.
Cardiovascular disease [4]: Increased risk of heart attack, stroke, atrial fibrillation, and heart failure.
Type 2 diabetes [4]: OSA may affect how the body uses insulin.
Stroke [4]: Sleep apnea is associated with an increased risk of stroke.
Safety concerns: Excessive daytime sleepiness increases the risk of road traffic and workplace accidents [4].
Relationship difficulties: Snoring can disrupt a bed partner’s sleep and cause tension in the relationship [2, 5].

4. Diagnosing snoring and obstructive sleep apnea (OSA)

To determine whether snoring indicates an underlying medical condition, doctors use several diagnostic approaches.

4.1. Clinical examination and medical history

The doctor will ask about the history of snoring, nighttime and daytime symptoms, personal and family medical history, and lifestyle factors. A bed partner can provide valuable information about episodes of interrupted breathing or gasping during sleep. The doctor will also examine the nose, mouth, throat, and neck to identify anatomical factors that may contribute to snoring [5].

4.2. Screening questionnaires and assessment scales

Epworth Sleepiness Scale (ESS): A questionnaire used to assess the severity of daytime sleepiness [5]. A high score may suggest an underlying sleep disorder.
Snoring scale score: Used to assess the severity and frequency of snoring.

4.3. Polysomnography (PSG)

Polysomnography is the gold standard for diagnosing OSA [5]. The patient may undergo an overnight sleep study in a sleep laboratory or, when appropriate, use specialized equipment at home. The following parameters may be recorded:

Brain electrical activity (electroencephalography, EEG) to assess sleep stages
Heart rate and electrical activity (electrocardiography, ECG)
Blood oxygen levels, measured using a sensor attached to a finger
Eye and leg movements
Airflow through the nose and mouth
Chest and abdominal movements
Snoring sounds

The sleep study data help doctors determine the frequency and severity of apnea and hypopnea episodes, enabling an accurate diagnosis [5].

5. When should you see a doctor?

You should seek medical evaluation if you or a family member notices any of the following signs [3]:

Very loud and persistent snoring
Snoring interrupted by pauses in breathing
Gasping, choking, or waking up suddenly during the night
Excessive daytime sleepiness despite getting enough sleep
Fatigue, difficulty concentrating, memory problems, or mood changes
Morning headaches
High blood pressure with no clear cause
Frequent snoring in children, particularly when accompanied by learning or behavioral problems

6. UMC and the journey toward better sleep

University Medical Center Ho Chi Minh City (UMC) emphasizes comprehensive healthcare, particularly in the field of sleep disorders. With an experienced team of specialists and modern equipment, UMC aims to provide effective diagnostic and treatment options for patients with snoring and OSA.

6.1. Team of specialists

UMC has specialists in otorhinolaryngology (ear, nose, and throat), respiratory medicine, and neurology with advanced training in sleep medicine. The specialists conduct thorough examinations, review medical histories, and develop individualized treatment plans tailored to each patient.

6.2. Modern diagnostic equipment

The hospital is equipped with advanced diagnostic technology, including modern polysomnography systems, which accurately record physiological parameters during sleep to assess sleep disorders and identify potential causes of snoring.

6.3. Comprehensive diagnostic and treatment process

At UMC, the evaluation and treatment of snoring follow a structured process, from initial examination and risk assessment to sleep studies, counseling, and the application of various treatment approaches. These may include lifestyle modifications, supportive devices, and surgical interventions when necessary. The goal is to help patients achieve better sleep, improve their quality of life, and prevent long-term health complications.

7. Preventing snoring and protecting sleep quality

Preventing snoring can improve sleep quality and contribute to overall health.

7.1. Maintaining a healthy weight

Weight loss is one of the most effective ways to reduce snoring, particularly in people who are overweight or obese. Maintaining a body mass index (BMI) within the normal range can help reduce fatty tissue around the neck and throat, thereby widening the airway.

7.2. Limiting alcohol and sedatives

Avoid alcohol and sedative medications before bedtime unless otherwise directed by your doctor. These substances relax the throat muscles and make airway obstruction more likely.

7.3. Creating an ideal sleep environment

Sleep on your side: Develop the habit of sleeping on your side rather than on your back.
Elevate the head of the bed: Raising the head of the bed by approximately 10–15 cm may help reduce snoring.
Keep the nasal passages clear: Saline nasal sprays or nasal strips may help relieve nasal congestion, particularly during a cold or an allergic episode.
Maintain a clean bedroom: Keep the bedroom clean and well ventilated, and minimize exposure to allergens such as dust and pet dander.

8. Frequently asked questions (FAQ)

Is snoring hereditary? Yes. Genetic factors may contribute to snoring and OSA, particularly when inherited anatomical features of the upper airway are involved [5].
Can women snore? Yes. Women can also snore, although the prevalence is generally lower than in men. However, the risk of snoring in women increases after menopause and during pregnancy [5].
Does snoring increase the risk of stroke? Pathological snoring, particularly snoring associated with OSA, is linked to an increased risk of cardiovascular conditions such as high blood pressure, heart attack, and stroke [2, 4].
Does everyone who snores loudly have sleep apnea? Not necessarily. Loud snoring is an important warning sign, but not everyone who snores loudly has OSA. However, loud, interrupted snoring is commonly associated with OSA [2, 5]. A medical evaluation is necessary to establish an accurate diagnosis.
Can snoring go away on its own? Primary snoring may improve or resolve with lifestyle changes, such as weight loss and avoiding alcohol. However, pathological snoring or OSA often requires medical intervention and rarely resolves on its own [5].
Is snoring in children dangerous? Snoring in children is not always harmless. It may indicate enlarged tonsils or adenoids or pediatric OSA, which can affect physical and mental development as well as learning ability [5].
Does alcohol increase snoring? Yes. Alcohol consumption, particularly in the evening, can increase the intensity and frequency of snoring by excessively relaxing the throat muscles [3, 5].

9. References

[1] Mayo Clinic. Snoring - Symptoms and causes. https://www.mayoclinic.org/diseases-conditions/snoring/symptoms-causes/syc-20377694. Accessed December 21, 2025.
[2] National Heart, Lung, and Blood Institute (NHLBI). (2024). Does how loud you snore matter to your health? https://www.nhlbi.nih.gov/news/2024/does-how-loud-you-snore-matter-your-health. Accessed December 21, 2025.
[3] MedlinePlus. Snoring. https://medlineplus.gov/snoring.html. Accessed December 21, 2025.
[4] Mayo Clinic. Sleep apnea - Symptoms and causes. https://www.mayoclinic.org/diseases-conditions/sleep-apnea/symptoms-causes/syc-20377631. Accessed December 21, 2025.
[5] BMJ Best Practice. Snoring - Symptoms, diagnosis and treatment. https://bestpractice.bmj.com/topics/en-gb/1035. Accessed December 21, 2025.

The information above is for reference purposes only and is not intended as medical advice. Please contact your doctor for detailed medical consultation.