Snoring can be a funny little quirk, but not everyone snores the same way. Some people are more prone to it than others, and a number of factors explain why. Understanding your personal risk factors is the first step toward doing something about it.
1. Anatomy of the Airway
The physical structure of your upper airway has a huge influence on whether and how much you snore. People with a naturally narrow airway, a long uvula, a large soft palate, or enlarged tonsils and adenoids are more prone to snoring simply because there’s less space for air to move freely.
When airflow is constricted, the surrounding soft tissue vibrates — that’s the snoring sound. Some people are born with anatomy that’s more predisposed to this; others develop it with age or weight gain.
2. Genetic Predisposition
Snoring runs in families — and it’s not just because families share lifestyles. Genetic factors influence both the structure of the airway and the tone of the pharyngeal muscles during sleep. If your parents or grandparents were significant snorers, there’s a higher likelihood that you will be too.
This doesn’t mean snoring is inevitable if it runs in your family, but it does mean you should be especially attentive to modifiable risk factors.
3. Body Weight
This is one of the most well-established relationships in sleep medicine. Excess weight — particularly around the neck and throat — physically narrows the airway by compressing it from the outside. The heavier the tissue surrounding the airway, the more it collapses during sleep.
Men with a neck circumference greater than 17 inches and women with a neck circumference greater than 16 inches are at significantly elevated risk for snoring and sleep apnea. Even modest weight loss (5–10% of body weight) can produce meaningful improvement.
4. Sleep Position
Back sleeping is the single most controllable snoring trigger. When you lie on your back, gravity pulls the tongue and soft palate toward the back of the throat, partially blocking the airway. The resulting vibration is what you — and everyone nearby — hears.
Side sleeping significantly reduces this effect. Many people who snore on their back don’t snore at all on their side. If your partner tells you your snoring is worst when you’re on your back, positional therapy is worth trying before anything else.
5. Lifestyle Choices — Alcohol and Smoking
Alcohol is a muscle relaxant. Consumed in the hours before bed, it causes pharyngeal muscles to relax more than they normally would, increasing the likelihood and intensity of snoring. Even people who don’t usually snore will often snore after drinking.
Smoking irritates and inflames the mucosal lining of the nose and throat, causing swelling that narrows the airway. Chronic smokers also have lower overall muscle tone in the pharynx. Both effects compound snoring severity.
Reducing alcohol — particularly in the 3 hours before sleep — and quitting smoking are among the highest-impact lifestyle changes for snorers.
6. Allergies and Nasal Congestion
When nasal passages are congested — from allergies, a cold, or structural issues like a deviated septum — you’re forced to breathe through your mouth. Mouth breathing bypasses the nasal passages and draws air directly across the soft palate and uvula, dramatically increasing the likelihood of tissue vibration.
Chronic allergy sufferers often snore year-round. People with seasonal allergies notice their snoring peaks during high pollen months. Treating the underlying nasal congestion (antihistamines, nasal corticosteroids, or in structural cases, surgery) often resolves the snoring directly.
7. Age
Muscle tone naturally decreases with age, including in the pharynx and tongue. The muscles that normally help keep the airway open during sleep become progressively less effective over time. Sleep architecture also changes — older adults spend less time in restorative deep sleep and more time in lighter sleep stages, during which the airway is less stable.
These changes are gradual and can’t be entirely reversed, but they can be significantly offset with weight management, regular exercise, and appropriate interventions for other risk factors.
What to Do If You Snore
The good news: most of the factors above are either modifiable or treatable. Start with the easy wins — sleep position, alcohol timing, and nasal congestion — before moving to devices. If snoring persists despite lifestyle adjustments, a mandibular advancement device is the most evidence-backed over-the-counter intervention available.
And if snoring is accompanied by gasping, witnessed breathing pauses, or excessive daytime fatigue, see a doctor — those symptoms point toward sleep apnea, which needs medical evaluation regardless of which device you eventually choose.