Sleep Apnea and GERD: Understanding the Vicious Cycle
Defining the Sleep Apnea-GERD Connection
Obstructive sleep apnea (OSA) occurs when the airway becomes blocked during sleep. The recurrent on-and-off breathing associated with OSA has health consequences that go way beyond disrupted sleep. One you may not have heard about is the connection between sleep apnea and gastrointestinal disorders—and it’s well-established in the scientific literature. Gastroesophageal reflux disease (GERD) is included in this broad category of issues related to sleep apnea.
In fact, even in studies that controlled for the multiple risk factors they share (such as being overweight and smoking, for example), an independent relationship between the two conditions persisted. What explains that relationship? It’s not known for sure, but increased investigation into how GERD and apnea impact each other is bringing us closer to understanding the connection.
In fact, even in studies that controlled for the multiple risk factors they share (such as being overweight and smoking, for example), an independent relationship between the two conditions persisted. What explains that relationship? It’s not known for sure, but increased investigation into how GERD and apnea impact each other is bringing us closer to understanding the connection.
Does Negative Pressure from Apnea Trigger Reflux?
Incidence rates of GERD are higher in people with obstructive sleep apnea than they are for the general public. However, the severity of OSA doesn’t seem to play into the development of GERD. And while one hypothesis suggests that obstructed breathing creates negative pressure that allows acidic gastric contents to come back up more easily, in general, the studies don’t support this idea. In fact, research shows that the lower esophageal sphincter (LES) actually provides a stronger barrier during apnea. So, while this explanation sounds logical, it doesn’t explain the relationship between GERD and OSA.
How Reflux Irritation Can Worsen Airway Obstruction (OSA)
Recent studies have confirmed a causal effect of reflux on sleep apnea. This is believed to be the stronger pathway that defines the GERD-OSA relationship. In other words, reflux increases the likelihood of sleep apnea—not the other way around. A primary mechanism for this is simply irritation and inflammation in the throat caused by the acidic reflux liquid. Not only does acid reflux cause spasms in the upper airway and larynx, thereby contributing to upper airway collapse, but it can also stimulate the vagus nerve, causing bronchial constriction and impairing respiratory muscle function. Together, this can all lead to a greater chance of OSA.
Silent Reflux (LPR) as a Factor in Airway Symptoms
Laryngopharyngeal reflux (LPR) is sometimes known as “silent reflux” because it doesn’t cause any chest pain the way regular acid reflux does. LPR is common in people with obstructive sleep apnea. One study found that among patients with OSA, 45% of them also had LPR. The relationship between LPR and OSA appears to be bidirectional, but not necessarily causal. In other words, it appears that the symptoms and mechanisms of one condition exacerbate the other. They are likely what’s called an overlapping syndrome. As such, a new term for the combined conditions has been proposed: CLOSA (combined laryngopharyngeal reflux and obstructive sleep apnea). Ongoing research focusing on CLOSA patients is needed.
Lifestyle Strategies for Managing Both GERD and Sleep Apnea
Put the “magic” of treatment synergy to work for you, starting with lifestyle modifications. Since both GERD, LPR, and OSA share risk factors, the odds are in your favor that making changes to improve one condition will lead to benefits for another, too.
- Weight Management – Weight gain is strongly associated with disordered breathing patterns during sleep. And visceral fat is an important risk factor for OSA. However, while obesity is an independent risk factor for OSA, not everyone with OSA is overweight. What’s more, weight loss among people with OSA does not guarantee improvement of apnea. Nevertheless, for people who are overweight and have OSA, weight loss is a typical treatment strategy—and can be helpful—regardless of whether GERD is also present. Weight loss is also commonly recommended for overweight GERD patients. Weight-management surgeries, while effective for weight loss and therefore potentially appropriate for both OSA and GERD, aren’t typically considered until lifestyle options are exhausted.
- CPAP Therapy – Wearing a Continuous Positive Airway Pressure (CPAP) device helps keep the airway open during sleep, and thus helps treat sleep apnea. Research shows that a CPAP is also effective in alleviating GERD symptoms in people with obstructive sleep apnea. In conjunction with weight loss, CPAP therapy may be more tolerable (lower pressures are needed) and more effective.
- Sleep Positions – Modifying your sleep position to help prevent reflux is a well-known method that provides varying amounts of relief, depending on the position and whether you also raise your torso. In general, elevating your head and torso with pillow positioning while sleeping on your left side seems to be the most effective. Body positioning devices may help keep you in the proper position.
An Eating Plan to Benefit Both Conditions
Aside from the benefits of weight loss, there is some research showing potential for certain diets or eating plans to help with sleep disorders, including sleep apnea. For example, the DASH diet is associated with reduced OSA severity. While the DASH diet was originally designed to help lower high blood pressure (hypertension), it’s generally considered a basic, healthy diet for the general public as well.
The primary foods in this plan are minimally processed plant foods (whole grains, legumes, nuts, vegetables, and fruit), along with sources of unsaturated fat. There is also a decreased reliance on red and processed meats, saturated fat, and sugars in the DASH diet. As for its relevance to GERD, there’s evidence that GERD and hypertension are risk factors for each other. Although the connections between the DASH diet, GERD, hypertension, and sleep apnea are not direct, there is enough overlap that adopting the DASH diet could be considered appropriate if you have even just one of these conditions.
The primary foods in this plan are minimally processed plant foods (whole grains, legumes, nuts, vegetables, and fruit), along with sources of unsaturated fat. There is also a decreased reliance on red and processed meats, saturated fat, and sugars in the DASH diet. As for its relevance to GERD, there’s evidence that GERD and hypertension are risk factors for each other. Although the connections between the DASH diet, GERD, hypertension, and sleep apnea are not direct, there is enough overlap that adopting the DASH diet could be considered appropriate if you have even just one of these conditions.
FAQs
Can GERD cause sleep apnea?
Current research suggests that reflux may contribute to the development or worsening of obstructive sleep apnea (OSA). Acid reflux can irritate the throat and upper airway, increasing inflammation and potentially making the airway more likely to collapse during sleep. While GERD may not directly cause OSA in every case, the two conditions frequently occur together.
Does treating sleep apnea help reduce acid reflux symptoms?
Yes. Studies have shown that continuous positive airway pressure (CPAP) therapy, a common treatment for sleep apnea, may also improve GERD symptoms. By helping keep the airway open during sleep, CPAP may reduce nighttime reflux episodes and improve overall sleep quality.
What is the best sleeping position for GERD and sleep apnea?
Sleeping on your left side with your head and upper body slightly elevated is generally considered one of the most effective positions for reducing reflux symptoms. This position may also benefit some individuals with sleep apnea by helping maintain a more open airway during sleep.
What lifestyle changes can improve both GERD and sleep apnea?
Several lifestyle modifications may benefit both conditions, including maintaining a healthy weight, avoiding large meals close to bedtime, limiting alcohol consumption, quitting smoking, and following a balanced eating pattern such as the DASH diet. These strategies can help reduce reflux symptoms while also supporting better sleep and respiratory health.
What is silent reflux, and how is it related to sleep apnea?
Silent reflux, also known as laryngopharyngeal reflux (LPR), occurs when stomach contents reach the throat and voice box without causing the typical heartburn associated with GERD. Research suggests that LPR is common among people with sleep apnea, and the two conditions may worsen one another by contributing to airway irritation and inflammation.
References
1National Heart, Lung, and Blood Institute (Jan., 2025). Sleep Apnea—What is Sleep Apnea? National Institutes of Health. Retrieved April 11, 2026 from https://www.nhlbi.nih.gov/health/sleep-apnea
2Yan, W., Zhou, J., Jiang, M., Kong, Y., Qin, H., Qi, Y., Wang, S., & Tai, J. (2024). Obstructive sleep apnea and 19 gastrointestinal diseases: a Mendelian randomization study. Frontiers in psychiatry, 15, 1256116. https://doi.org/10.3389/fpsyt.2024.1256116
3Shepherd, K., & Orr, W. (2016). Mechanism of Gastroesophageal Reflux in Obstructive Sleep Apnea: Airway Obstruction or Obesity?. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 12(1), 87–94. https://doi.org/10.5664/jcsm.5402
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