What is sleep apnea?
Sleep apnea is a sleep disorder where your breathing repeatedly stops and starts during sleep.1 This can make it harder for your body to get enough oxygen.
The most common form is obstructive sleep apnea (OSA), which is where the muscles around the throat relax to the point of collapse, restricting airflow during sleep.12
OSA symptoms include:5
- Excessive daytime sleepiness
- Morning headaches
- Feeling irritable or moody
- Difficulty concentrating or struggling to feel present during the day
- Snoring or gasping for air while you sleep
Your brain may briefly wake you to help reopen your airway so you can start breathing again. These breathing pauses usually happen so quickly that many people living with sleep apnea don’t remember them. However, these tiny sleep disturbances can greatly impact your sleep quality — and is why many people with sleep apnea experience low energy, brain fog and daytime tiredness. Additionally, untreated sleep apnea can interfere with healthy dream patterns, preventing you from getting the restorative rest you need to feel energized and emotionally balanced.
How sleep apnea affects dreaming
The relationship between your breath and your dreams is intimate and powerful. When your breathing is interrupted, your brain receives a distress signal that can dramatically change the content and quality of your dreams.13
Disrupted sleep cycles
Sleep is a cycle of stages that repeat throughout the night.14 People with sleep apnea experience frequent awakenings that can interrupt rapid eye movement (REM) sleep — the stage associated with dreaming.13,14 Under normal circumstances, a person may cycle between non-REM (NREM) sleep and REM sleep every 90 to 110 minutes. However, the muscle relaxation that causes sleep apnea is usually at its worst during REM sleep. This means that just as you drift into a dream, your airway may collapse.
When sleep apnea stops you from spending time in REM sleep, your brain may respond by increasing time spent in REM sleep.13 This can lead to dreams that feel incredibly intense and sometimes overwhelming.15
Oxygen and the brain
Your brain is very sensitive to changes in oxygen levels. Breathing pauses may lead to drops in oxygen, which can trigger a stress response in the brain.16 In some cases, this may produce anxiety-filled or fearful dreams.17 As oxygen levels fall and carbon dioxide builds up, your brain tries to wake up to restore airflow.
That sense of panic can influence your dream narrative. Researchers have long noted that the content of nightmares in people with sleep apnea often reflects their physical reality.18 Repeated awakenings can also blur the line between dream and reality, leading to confusion or distress upon waking. Because these sleep disruptions are often sudden and fueled by a surge of adrenaline (the body’s fight or flight hormone), it’s not uncommon to wake up with a pounding heart or sense of doom.13 These emotional hangovers can linger into the next day, contributing to the anxiety and irritability often felt by people living with untreated sleep apnea.
The role of CPAP and other treatments
When it comes to nightmares, if the cause is sleep apnea, then treating the condition can help provide relief from bad dreams. For some people with undiagnosed sleep apnea, the path to more peaceful dreams begins with finding the right treatment.
What is CPAP therapy?
Continuous positive airway pressure (CPAP) therapy uses a mask that fits over your nose and/or mouth, connected to a machine that delivers a steady flow of air.20 This air is designed to keep your airway open and reduce breathing pauses while you sleep.
CPAP therapy can help reduce breathing pauses, support healthy oxygen levels and restore normal sleep patterns for people with obstructive sleep apnea (OSA). By preventing the breathing pauses that disrupt your sleep, CPAP allows your brain to cycle naturally through light, deep and rapid eye movement (REM) sleep without interruption. And when you sleep better, your physical and mental health can benefit.21
With regular use, CPAP therapy may contribute to fewer nightmares, calmer dreams and better morning alertness.22,23 While some people may experience a temporary increase in dream vividness when they first start therapy, this typically settles down as the brain catches up on quality sleep.24
Other treatment options
While CPAP is the leading treatment for OSA, other options may be available.25 It’s up to you and your doctor to decide on a treatment plan that best suits you. Other treatments include:
- APAP and bilevel therapy: APAP automatically changes air pressure throughout the night based on your breathing patterns. Bilevel therapy uses two pressure settings, one for inhaling and a lower one for exhaling. Your doctor will recommend whichever type best suits your sleep apnea diagnosis.
- Oral appliances: These custom-fitted mouthpieces are made by a dentist. They hold the jaw slightly forward during sleep to keep the airway from narrowing.
- Surgery: Surgery is typically an option when physical differences like enlarged tonsils or a deviated septum is a contributing factor. As with any surgery, your doctor will weigh the
potential benefits against the risks before recommending it.
- Lifestyle changes: For people with mild sleep apnea, lifestyle changes like increasing cardio exercise, losing weight, reducing alcohol intake, limiting caffeine intake, managing stress and adjusting sleep position may help reduce symptoms.
