Sleep Apnea: Causes, Symptoms, and Treatment Options

What is Sleep Apnea?

If you often wake up tired, even after a full night’s sleep, sleep apnea might be the reason.
Sleep apnea is a sleep disorder that causes your breathing to repeatedly stop and start during sleep. These pauses can last a few seconds or longer, sometimes happening hundreds of times a night.

Each time this happens, your body briefly wakes you up to restart breathing. You might not remember these moments, but your body certainly does, leaving you exhausted and putting unnecessary strain on your heart over time.

Types of Sleep Apnea

There are three main types of sleep apnea:

• Obstructive Sleep Apnea (OSA) – The most common type. This occurs when the muscles in your throat relax and block airflow during sleep.
• Central Sleep Apnea (CSA) – Happens when your brain fails to send the proper signals to control breathing muscles.
• Complex (Mixed) Sleep Apnea – A combination of both obstructive and central types.

How Common Is Sleep Apnea?

Sleep apnea is far more common than many realise. Studies estimate that nearly 1 billion people worldwide between ages 30–69 live with obstructive sleep apnea (OSA). Central sleep apnea is less common but still affects a large number of individuals, especially those with heart conditions or neurological disorders.

Symptoms of Sleep Apnea

Sleep apnea affects both night-time rest and day-time alertness. Common signs include:

• Loud snoring
• Waking up gasping or choking
• Pauses in breathing (often noticed by a partner)
• Morning headaches
• Feeling exhausted despite a full night’s sleep
• Mood swings, irritability, or depression
• Night sweats
• Restlessness or frequent awakenings

Children may show different symptoms such as bedwetting, behavioural issues, or poor school performance.

What Causes Sleep Apnea?

The underlying cause depends on the type:

• Obstructive Sleep Apnea – Caused by airway blockage due to relaxed throat muscles, large tonsils, or excess tissue in the neck area.
• Central Sleep Apnea – Caused by issues in how the brain controls breathing.
• Mixed Sleep Apnea – A combination of both airway obstruction and neurological control issues.

Risk Factors

Anyone can develop sleep apnea, but you may be at higher risk if you have:

• A family history of sleep apnea
• Obesity or a thicker neck circumference
• Large tonsils
• High blood pressure or heart conditions
• Are male or over age 50

However, it’s important to note that people of any age, gender, or body size can develop sleep apnea.

Why Sleep Apnea Is Serious

Untreated sleep apnea can lead to dangerous complications such as:

• High blood pressure
• Heart disease and arrhythmias
• Stroke
• Type 2 diabetes
• Daytime “microsleeps” momentary dozing that can be fatal while driving or operating machinery

Essentially, untreated sleep apnea puts long-term strain on your heart and brain, increasing your risk of sudden cardiac events.

Diagnosis and Testing Sleep Apnea

If sleep apnea is suspected, a healthcare provider may recommend one of the following:

• Polysomnography (Sleep Study) – An overnight test in a clinic that measures breathing patterns, oxygen levels, heart rate, and brain activity.
• Home Sleep Apnea Test (HSAT) – A simplified version of the sleep study done at home, useful for detecting obstructive sleep apnea.

Sleep apnea severity is often measured by the Apnea-Hypopnea Index (AHI):

• Mild: 5–14 events/hour
• Moderate: 15–29 events/hour
• Severe: 30+ events/hour

Treatment Options for Sleep Apnea

Treatment depends on the type and severity. Common approaches include:

• Lifestyle adjustments: Weight loss, avoiding alcohol, changing sleep positions, or treating nasal allergies.
• Oral appliances: Custom mouthpieces that keep your airway open.
• Continuous Positive Airway Pressure (CPAP) machines: Devices that deliver steady airflow through a mask to prevent airway collapse.
• Surgery: In cases of structural airway issues (tonsils, jaw alignment, nasal obstruction).
• Neuromuscular stimulation devices: Help prevent airway muscle collapse.

Choosing the Right CPAP Machine

For many people, a CPAP machine is the most effective and non-invasive way to manage sleep apnea.
There are three main types:

1. CPAP (Continuous Positive Airway Pressure): Delivers a constant air pressure.
2. BiPAP (Bilevel Positive Airway Pressure): Provides two pressure levels, one for inhaling, one for exhaling.
3. APAP (Automatic Positive Airway Pressure): Adjusts air pressure automatically based on your breathing.

Read > CPAP vs. BiPAP: Understanding the Differences

Best CPAP Machines — According to Reddit Users

On a recent Reddit thread in the r/CPAP community, users voted and shared their experiences with top-rated machines. Here’s a summary of the most-mentioned models:

These models are widely praised for comfort, durability, and ease of cleaning, three major factors that determine whether users stick to treatment long term.

(Always consult a healthcare professional before purchasing or changing your CPAP device.)

Living With Sleep Apnea

Managing sleep apnea is a lifelong commitment to better sleep hygiene and treatment consistency. You can improve your quality of life by:

• Following your treatment plan carefully
• Keeping your CPAP machine clean and replacing filters regularly
• Sticking to a sleep schedule
• Avoiding sedatives and alcohol before bed
• Scheduling follow-up visits with your healthcare provider

Frequently Asked Questions

Can sleep apnea be fixed?
Yes, depending on the cause. For some people, weight loss or surgery can resolve obstructive sleep apnea. For others, ongoing use of a CPAP or oral device is necessary.

Is sleep apnea dangerous?
Yes. Untreated sleep apnea can increase your risk of heart disease, stroke, and sudden cardiac death.

Does your heart stop when you have sleep apnea?
Your breathing pauses can trigger irregular heart rhythms, which over time can strain the heart, but your heart doesn’t stop completely.

What are early warning signs of sleep apnea?
Loud snoring, choking during sleep, dry mouth in the morning, and excessive daytime tiredness are key signs.

Which organs are affected?
Sleep apnea impacts the heart, brain, and nervous system most significantly.

Do I have to use CPAP forever?
For most people, CPAP is lifelong, because airway anatomy doesn’t change. Instead of thinking of CPAP as “forever,” think of it as a lifelong ally, helping you breathe, sleep, and live better.

Read > Do I have to use CPAP forever?

Sleep apnea is a serious yet highly manageable condition. With the right diagnosis, lifestyle changes, and a reliable CPAP machine, most people can regain deep, restorative sleep and dramatically reduce their health risks.

If you suspect you might have sleep apnea, don’t ignore the signs, talk to a healthcare professional and explore your treatment options.