One of the funniest moments in the first season of Stranger Things was when Eleven, then a lab rat with limited vocabulary and speech understanding, called a bully “mouth breather.”
Now, while this phrase is typically used as an insult to call someone dumb or stupid, in some cases, it is also used to call out someone who literally breathes loudly through their mouth.
Hearing a mouth breather—well, breathe—can be distracting and annoying, even more so if you have to sleep beside them every night. But for a rare group of people, it’s not even something they choose to do consciously.
Catathrenia, sleep groaning, or nocturnal groaning is a sleep disorder characterized by exactly this—groaning and other strange vocalizations that arise as one loudly breathes out while asleep. Unlike snoring, which happens during inhalation, nocturnal groaning occurs exclusively on the exhale.
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Quick Facts - Nocturnal Groaning or Catathrenia
Frequency: Very rare, 0.17 to 0.4%* of the global population
Risk Factors: Pre-existing sleeping disorders such as obstructive sleep apnea and sleep talking, family history of catathrenia, alcohol use, history of nocturnal groaning in childhood or adolescence
Treatment: Continuous positive airway pressure (CPAP), breathing exercises
Symptoms - Nocturnal Groaning or Catathrenia
There’s a bit of a debate among researchers as to whether nocturnal groaning is a disorder in itself, or is a symptom of another underlying breathing or sleeping disorder such as sleep apnea. It is often hard to diagnose catathrenia because it can occur with other symptoms such as sleep talking or snoring.
Here are the most commonly reported symptoms, or things that people experience during a sleep groaning episode.
- Holding the breath for 5-15 seconds
- Exhaling slowly, accompanied by a moaning or groaning sound
- Not feeling rested or refreshed even after a full night’s sleep (8 hours and above)
- Feelings of fatigue
- Sudden awakenings and choking or gasping for air
- Sore throat
Causes - Nocturnal Groaning or Catathrenia
According to the American Thoracic Society, catathrenia is poorly understood and is believed to be widely underreported because many people experiencing it don’t seek medical treatment.
While the definite causes for this condition are still unknown, and most studies remain inconclusive, researchers have found links between adult onset catathrenia and certain conditions, such as the following:
- Family history of the disorder
- Anxiety and/or depression
- Alcohol use
- History of nocturnal groaning in childhood or adolescence
- Tooth extraction or orthodontic intervention in adolescence or early adulthood
Treatment - Nocturnal Groaning or Catathrenia
According to experts, catathrenia in itself does not appear to put patients at physical risk, which is why there aren’t a lot of studies that look into effective treatment for the disorder.
In most cases, no further treatment is necessary, and complaints of sleep disturbance are actually reported more by the bed partners of those who exhibit the symptoms, rather than those who have the condition themselves.
However, certain methods and treatments have also been found to help decrease the severity or frequency of sleep groaning symptoms.
- Continuous positive airway pressure or CPAP – Due to catathrenia being a sleep disorder that affects breathing, CPAP machines and devices are by far the only treatment that studies have proven can eliminate nocturnal groaning in patients.
- Breathing exercises and meditation – Though further research has yet to be conducted to determine effectiveness of this category of action, some researchers believe that deep breathing exercises, as well as yoga and meditation, could help alleviate symptoms of nocturnal groaning.
How You Will Overcome Nocturnal Groaning or Catathrenia
If your partner or loved one is exhibiting symptoms of catathrenia, and it’s starting to seriously disrupt your sleep, the American Sleep Association recommends this super easy fix: buy earplugs! As mentioned, it’s more often the bed partner, rather than the person experiencing sleep groaning, that complains of reduced sleep quality.
All in all, there’s no cause for panic at all if you or someone you know is experiencing catathrenia. However, if the nocturnal groaning is accompanied by chronic loud snoring and labored breathing, it’s best to consult a specialist.
Did you know?
This article is part of our Complete Guide to Sleep Disorders - A resource that will help you get your quality sleep back. Click here to learn more about sleep disorders, their causes, symptoms and how to overcome them.