Clearing the sinuses tracked with quieter, steadier breathing at night

Rhinosinusitis blocks the nose and inflames the upper airway, both of which are thought to feed into sleep-disordered breathing: the family of problems that includes obstructive apnoeas and hypopnoeas during sleep. That mechanism is widely assumed, but the more practical question is whether actually treating the sinus disease shifts the breathing itself, rather than just the daytime congestion. If it does, the nose becomes a legitimate target in people whose disturbed sleep sits alongside chronic sinus problems. This review set out to gather what the published before-and-after data say about that link.

The authors ran a systematic review following PRISMA 2020 guidelines, searching PubMed, Medline, Web of Science, Science Direct and Google Scholar. They included studies that reported both pre-treatment and post-treatment outcomes in patients with rhinosinusitis, covering nasal symptoms, endoscopic findings of the sinuses, and sleep-related respiratory measures such as the apnoea-hypopnoea index. Fifteen studies met the inclusion criteria, spanning surgical treatment such as functional endoscopic sinus surgery as well as biologic therapy and standard medical management. Because the included studies differed so much clinically and methodologically, the team judged a quantitative meta-analysis inappropriate and synthesised the findings narratively instead.

The included studies showed consistent improvements in sleep-related outcomes after rhinosinusitis was treated. Reductions in the apnoea-hypopnoea index and improvements in endoscopic findings were reported frequently across both surgical and medical interventions. Functional endoscopic sinus surgery was associated with notable gains in sleep quality, daytime sleepiness and sinonasal symptom scores in several of the studies, while biologic therapy and medical management were linked to less nasal obstruction and rhinorrhoea and lower inflammatory markers. The weaker part of the picture was subjective nasal symptoms, where outcomes were more variable from study to study, and no pooled effect size was produced for any outcome.

This supports the existing idea that inflammatory compromise of the nasal airway contributes to the burden of sleep-disordered breathing, and extends it from mechanism to treatment response. But the review deliberately stops short of a number: with no meta-analysis, there is no estimate of how much the apnoea-hypopnoea index typically falls, and before-and-after designs without control groups leave room for natural fluctuation and expectation effects. Open questions include which patients benefit most, whether medical and surgical routes differ in size of effect, and how sinus treatment sits alongside established therapies for sleep-disordered breathing. The mismatch between objective improvement and inconsistent subjective nasal scores also needs explaining.

If disturbed night-time breathing coexists with long-running sinus inflammation and nasal obstruction, this is a reason to think the two may be connected rather than coincidental. The reviewed evidence points towards objective sleep-breathing measures improving when the sinus disease is treated, whether by surgery, biologics or medication. It is not evidence that sinus treatment substitutes for the standard assessment and management of sleep-disordered breathing, and the absence of any pooled figure means the likely size of the benefit is genuinely unknown. Treat it as a signal worth raising with a clinician rather than a settled result.