You might have your mother’s eyes and your father’s hair. But what about their snoring or restless sleep? Is obstructive sleep apnea (OSA) genetic, too?

The short answer is yes. OSA is a complex sleep disorder shaped by both genetics and lifestyle factors. Thanks to advances in sleep medicine, healthcare specialists now understand more about what causes sleep disorders.

Research shows that OSA has a strong genetic link, but genes aren’t the only cause. This article looks at what the science says about genetics and OSA, other risk factors, and what you can do if OSA seems to run in your family.

How Are Genetics Involved in Obstructive Sleep Apnea?

Most cells in your body contain DNA, which acts like an instruction book for how your body grows and functions. These instructions, called genes, influence traits such as your height or hair type. People have tens of thousands of genes.

Small differences in genes, called variants, make each person unique and help explain why some individuals are more prone to certain health conditions. Research links certain gene variants to risk factors for obstructive sleep apnea. Here, we focus on variants that research strongly supports.

Body Weight and Fat Distribution

Your genes affect your natural body weight and how fat is stored. The FTO gene helps control energy use and fat storage. Certain variations can make weight gain more likely and raise the risk of OSA, even in people who aren’t overweight, by causing more fat to build up around the neck and press on the airway.

The LEPR gene helps your brain sense fullness. If this gene doesn’t work well, you might eat more than you need, leading to extra weight that puts more pressure on the airway and increases OSA risk.

Airway and Facial Structures

The size and shape of your face and jaw affect how much space your airway has. Some people naturally have smaller jaws or narrower airways, which makes it easier for the airway to close during sleep. These traits can run in families.

Certain genes, such as PAX9 and ALX3, help control the growth of bones in the face and jaw. Variants can cause a smaller airway, making it harder to breathe during sleep and increasing the risk of OSA.

Breathing Control and Muscle Tone

During sleep, your brain sends signals to keep the airway muscles slightly firm so the airway stays open. Variants in the GPR83 gene can weaken the tongue muscles during sleep, causing the tongue to fall back and block the airway. This leads to more frequent breathing pauses, shown by a higher apnea-hypopnea index — a scale that’s used to diagnose OSA.

The ARRB1 gene affects how the body reacts when oxygen levels drop during sleep. Some variations can make it harder for the brain to react quickly, causing longer breathing pauses and making sleep apnea worse.

Inflammation and Immune Response

The TNF-alpha gene helps control inflammation in the body, and some variations make inflammation more active. This leads to swelling of the throat tissues, which narrows the airway and worsens OSA symptoms. PTGER3 variants can also increase overall inflammation and may disrupt normal breathing control during sleep.

A Risk Factor, Not a Guarantee

Parents can pass down a higher risk of OSA to their children. However, because OSA is not caused by a single gene, these genetic variations simply make someone more likely to develop it — not guarantee it.

Nongenetic Factors of Obstructive Sleep Apnea

Even though genetics plays a role, many factors that affect sleep apnea aren’t inherited. These nongenetic factors come from your body, habits, and daily environment, and many can be changed or managed.

Fixed Factors

Although these factors are out of your control, understanding them can help you recognize your personal risk:

• Age — Muscle tone naturally decreases with age, including in muscles that help keep the airway open. This makes the airway more likely to collapse during sleep.
• Sex — OSA is more common in men, according to Johns Hopkins Medicine. Women’s risk of OSA can change at different stages of life and may rise during menopause due to hormonal changes.
• Facial and jaw shape — Some people have naturally smaller jaws, narrow airways, or facial shapes that crowd the airway.

Changeable Factors

Your lifestyle and environment can affect airway blockage — but, unlike age or genetics, these factors can be changed. You can lower your risk, manage symptoms, and reduce the severity of your sleep apnea by adjusting factors such as these:

• Excess body weight — Being overweight and having sleep problems are closely connected, and even modest weight loss can help improve breathing. Extra weight puts pressure on the airway and makes it more likely to collapse, while poor sleep from OSA can disrupt hunger signals and lead to further weight gain.
• Smoking — Chemicals in cigarette smoke irritate the upper airway and cause it to swell and narrow. Smoking can also make it harder to get deep, restful sleep.
• Alcohol and sedatives — These substances relax the muscles of the throat, making the airway more likely to narrow or collapse during sleep. They also reduce the brain’s ability to wake the body when oxygen levels drop, making OSA more severe.
• Sleeping position — Sleeping on your back allows gravity to pull the tongue and soft palate backward, partially blocking the throat. Sleep apnea may be worse when you lie on your back but milder when sleeping on your side.
• Nasal blockage — Allergies, sinus issues, or chronic congestion can force mouth breathing and worsen airway collapse during sleep. Treating the cause can help relieve symptoms and make breathing easier.

The Gene-Environment Interaction

OSA develops through a mix of genetic makeup and daily environment. Your genes may shape factors such as your airway or how your body stores fat, but your lifestyle choices — including what you eat, how you sleep, how active you are, and whether you smoke or drink — affect the impact of those genes. Even if you inherit a higher risk of OSA, changing the factors you can control can help reduce the impact of those genes and support better sleep health.

Steps To Take if You Have a Family History of Sleep Apnea

If sleep apnea runs in your family, stay alert for symptoms like loud snoring, excessive daytime sleepiness, and morning headaches. If you or someone else notices more serious signs — such as choking, gasping, or pauses in breathing during sleep — talk with your primary care doctor promptly. Since you may not notice these episodes yourself, asking a partner or family member what they observe at night can be very helpful.

If you think you may have OSA, take proactive steps. Keeping a sleep diary to track snoring, daytime fatigue, and sleep quality can give your healthcare provider useful information. These details can help them guide your next moves, such as:

• Completing a risk assessment questionnaire
• Arranging a sleep study
• Discussing treatment options such as a CPAP (continuous positive airway pressure) machine, if needed

It also helps to keep a record of your family’s health history, especially noting relatives with sleep apnea, obesity, or high blood pressure. Sharing this information with your doctor gives them a clearer picture of your background and helps them provide more personalized care.

While genetics can play a role, it isn’t destiny. Lifestyle changes can make a big difference. Open communication with your healthcare provider and consistent self-care help put you in control and have a lasting impact on your sleep and overall health.

Join the Conversation

On MySleepApneaTeam, people share their experiences with obstructive sleep apnea, get advice, and find support from others who understand.

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