Overview

Obstructive sleep apnea is the most common sleep-related breathing disorder. It causes you to repeatedly stop and start breathing while you sleep.

There are several types of sleep apnea, but the most common is obstructive sleep apnea. This type of apnea occurs when your throat muscles intermittently relax and block your airway during sleep. A noticeable sign of obstructive sleep apnea is snoring.

Treatments for obstructive sleep apnea are available. One treatment involves using a device that uses positive pressure to keep your airway open while you sleep. Another option is a mouthpiece to thrust your lower jaw forward during sleep. In some cases, surgery might be an option too.

Obstructive sleep apnea care at Mayo Clinic

Symptoms

Signs and symptoms of obstructive sleep apnea include:

• Excessive daytime sleepiness
• Loud snoring
• Observed episodes of stopped breathing during sleep
• Abrupt awakenings accompanied by gasping or choking
• Awakening with a dry mouth or sore throat
• Morning headache
• Difficulty concentrating during the day
• Mood changes, such as depression or irritability
• High blood pressure
• Decreased libido

When to see a doctor

Consult a medical professional if you have, or if your partner observes, the following:

• Snoring loud enough to disturb your sleep or that of others
• Waking up gasping or choking
• Pausing in your breathing during sleep
• Having excessive daytime drowsiness, which may cause you to fall asleep while working, watching television or even driving a vehicle

Snoring doesn’t necessarily indicate something potentially serious, and not everyone who snores has obstructive sleep apnea.

Be sure to talk to your doctor if you snore loudly, especially if your snoring is interrupted by periods of silence. With obstructive sleep apnea, snoring usually is loudest when you sleep on your back, and it quiets when you turn on your side.

Ask your doctor about any sleep problem that leaves you chronically fatigued, sleepy and irritable. Excessive daytime drowsiness may be due to other disorders, such as narcolepsy.

Causes

Obstructive sleep apnea occurs when the muscles in the back of your throat relax too much to allow normal breathing. These muscles support structures including the back of the roof of your mouth (soft palate), the triangular piece of tissue hanging from the soft palate (uvula), the tonsils and the tongue.

When the muscles relax, your airway narrows or closes as you breathe in, hampering your breathing for 10 seconds or longer. This can lower the level of oxygen in your blood and cause a buildup of carbon dioxide.

Your brain senses this impaired breathing and briefly rouses you from sleep so that you can reopen your airway. This awakening is usually so brief that you don’t remember it.

You can awaken with shortness of breath that corrects itself quickly, within one or two deep breaths. You might make a snorting, choking or gasping sound.

This pattern can repeat itself five to 30 times or more each hour, all night long. These disruptions impair your ability to reach the deep, restful phases of sleep, and you’ll probably feel sleepy during your waking hours.

People with obstructive sleep apnea might not be aware of their interrupted sleep. Many people with this type of sleep apnea don’t realize they haven’t slept well all night.

Risk factors

Anyone can develop obstructive sleep apnea. However, certain factors put you at increased risk, including:

• Excess weight. Most but not all people with obstructive sleep apnea are overweight. Fat deposits around the upper airway can obstruct breathing. Medical conditions that are associated with obesity, such as hypothyroidism and polycystic ovary syndrome, also can cause obstructive sleep apnea.
• Older age. The risk of obstructive sleep apnea increases as you age but appears to level off after your 60s and 70s.
• Narrowed airway. You might inherit naturally narrow airways. Or your tonsils or adenoids might become enlarged and block your airway.
• High blood pressure (hypertension). Obstructive sleep apnea is relatively common in people with hypertension.
• Chronic nasal congestion. Obstructive sleep apnea occurs twice as often in those who have consistent nasal congestion at night, regardless of the cause. This may be due to narrowed airways.
• Smoking. People who smoke are more likely to have obstructive sleep apnea.
• Diabetes. Obstructive sleep apnea might be more common in people with diabetes.
• Sex. In general, men are twice or three times as likely as premenopausal women to have obstructive sleep apnea. The frequency of obstructive sleep apnea increases in women after menopause.
• A family history of sleep apnea. Having family members with obstructive sleep apnea might increase your risk.
• Asthma. Research has found an association between asthma and the risk of obstructive sleep apnea.

Complications

Obstructive sleep apnea is considered a serious medical condition. Complications can include:

• Daytime fatigue and sleepiness. Because of a lack of restorative sleep at night, people with obstructive sleep apnea often have severe daytime drowsiness, fatigue and irritability. They might have difficulty concentrating and find themselves falling asleep at work, while watching TV or even when driving. This can put them at higher risk of work-related accidents.

  Children and young people with obstructive sleep apnea might do poorly in school and commonly have attention or behavior problems.

• Cardiovascular problems. Sudden drops in blood oxygen levels that occur during obstructive sleep apnea increase blood pressure and strain the cardiovascular system. Many people with obstructive sleep apnea develop high blood pressure (hypertension), which can increase the risk of heart disease.

  The more severe the obstructive sleep apnea, the greater the risk of coronary artery disease, heart attacks, heart failure and strokes.

  Obstructive sleep apnea increases the risk of abnormal heart rhythms (arrhythmias), which can lower blood pressure. If there’s underlying heart disease, these repeated multiple episodes of arrhythmias could lead to sudden death.

• Complications with medications and surgery. Obstructive sleep apnea is also a concern with certain medications and general anesthesia. These medications, such as sedatives, narcotic analgesics and general anesthetics, relax your upper airway and can worsen your obstructive sleep apnea.

  If you have obstructive sleep apnea, having major surgery, especially after being sedated and lying on your back, can worsen breathing problems. People with obstructive sleep apnea might be more prone to complications after surgery.

  Before you have surgery, tell your doctor if you have obstructive sleep apnea or symptoms related to the condition. Your doctor might want you tested for obstructive sleep apnea before surgery.

• Eye problems. Some research has found a connection between obstructive sleep apnea and certain eye conditions, such as glaucoma. Eye complications can usually be treated.
• Sleep-deprived partners. Loud snoring can keep those around you from getting good rest and eventually disrupt your relationships. Some partners choose to sleep in another room.

People with obstructive sleep apnea may also complain of memory problems, morning headaches, mood swings or depression, and a need to urinate frequently at night.

Obstructive sleep apnea might be a risk factor for COVID-19. People with obstructive sleep apnea have been found to be at higher risk for developing a severe form of COVID-19 and needing hospital treatment than those who don’t have obstructive sleep apnea.

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