Written by the Nuvirox Research Team
Key Points
- Randomized controlled trials in ICU settings have consistently found earplugs (often combined with eye masks) improve subjective sleep quality, and in some studies, objective sleep architecture.
- The clearest documented downside of regular hearing-protection-device use is an increased risk of cerumen (earwax) impaction, per the American Academy of Otolaryngology's clinical practice guideline.
- Most of the direct evidence on device-related earwax impaction comes from hearing aid users, not earplug users specifically — the mechanism (something occluding the canal) is similar, but it's an extrapolation, not a direct study of nightly foam earplugs.
Short answer: earplugs help you sleep through noise, and nightly use does carry a real, if modest, earwax risk — the smart move is using them well rather than avoiding them entirely. Here's what the research on both sides actually supports.
Do earplugs actually improve sleep?
Yes, and the evidence here is genuinely solid, if drawn mostly from a specific setting: the intensive care unit. ICUs are noisy, unpredictable environments, and several randomized controlled trials have tested earplugs, often paired with eye masks, against standard care. A trial of surgical ICU patients found the intervention group's subjective sleep quality score, measured by the Richards-Campbell Sleep Questionnaire, was significantly higher than the control group's — a large enough difference that the trial was stopped early because the benefit was already clear.
A separate randomized trial that measured actual sleep architecture via polysomnography found earplugs and eye masks increased the proportion of deep (N3) sleep, though this particular result landed just short of conventional statistical significance (p=0.09) — a useful reminder that not every earplug study finds a slam-dunk effect, even when the direction of the result points the same way across studies.
Does that ICU evidence apply to sleeping at home?
Partially. The mechanism — blocking disruptive noise so the brain isn't repeatedly startled into lighter sleep stages — is the same whether the noise source is hospital equipment or a snoring partner, traffic, or a noisy street. But ICU patients are a specific population dealing with unusually disruptive, unpredictable noise and frequent medical checks; a healthy adult with a moderately noisy bedroom is a different situation, even if the underlying principle (noise fragments sleep) holds.
What's the actual downside of nightly use?
The most well-documented physiological concern is cerumen (earwax) impaction. Earwax naturally migrates outward from the eardrum over time, carrying debris with it. Anything sitting in the ear canal overnight, every night, can interfere with that migration.
Here's the honest caveat on this point: the strongest clinical evidence for device-related earwax impaction comes from hearing aid users, not specifically from earplug wearers. The American Academy of Otolaryngology-Head and Neck Surgery Foundation's clinical practice guideline on cerumen impaction notes that hearing aid users have a higher incidence of impaction, tied to obstruction of normal wax migration and clearing mechanisms. Earplugs work on the same physical principle — an object occupying the canal — but a dedicated, large-scale study measuring impaction rates specifically in nightly earplug users, as distinct from hearing aid users, is not something this review located. The extrapolation is reasonable given the shared mechanism, but it is an extrapolation.
What human studies actually show
Obanor et al. (surgical ICU trial). Earplugs and eye masks significantly improved subjective sleep quality (Richards-Campbell Sleep Questionnaire) in ICU patients undergoing frequent overnight assessments, with the trial stopped early due to a clear benefit.
A separate randomized ICU polysomnography trial found a higher proportion of deep sleep with earplugs and eye masks, though the primary outcome fell just short of statistical significance — an honest null-leaning result worth including alongside the positive ones.
Hu et al., 2015, Critical Care. Earplugs and eye masks combined with relaxing music improved multiple sleep measures (depth of sleep, falling asleep, awakenings) in post-cardiac-surgery ICU patients compared to standard care.
Schwartz et al., 2017, AAO-HNSF clinical practice guideline. Cerumen impaction affects an estimated 5% of healthy adults generally, with meaningfully higher rates in populations that regularly wear something in the ear canal, such as hearing aids.
What earplugs won't do
Earplugs address noise-driven sleep disruption specifically. They won't help with sleep problems rooted in anxiety, an irregular schedule, or an underlying sleep disorder, and they don't address light-based disruption on their own (many of the trials above paired them with an eye mask for that reason). If you notice hearing changes, a sense of fullness in your ear, or discomfort after starting regular earplug use, that's worth a look from a doctor rather than continuing to push a plug deeper.
How to use them without the downside
Foam earplugs that expand gently in the outer portion of the canal, rather than rigid plugs pushed in deeply, are generally considered a lower-risk choice for wax migration. Giving your ears occasional plug-free nights, and having a healthcare provider check for wax buildup if you notice muffled hearing or fullness, are reasonable, low-effort ways to capture the sleep benefit without letting a minor habit become an ear-care problem.
Frequently asked questions
Frequently asked questions
Is it bad to wear earplugs every single night?
Nightly use carries a real, if modest, increased risk of earwax buildup based on the shared mechanism with hearing aid research, but for most healthy adults this is manageable with occasional plug-free nights and basic ear-health awareness, not a reason to avoid earplugs altogether.
Are foam or silicone earplugs better for sleep?
Foam earplugs that expand within the outer canal are generally considered gentler on natural wax migration than plugs inserted deeply. Either type can be effective for noise reduction, and pairs well with white noise for people who want sound masking rather than full silence.
How do I know if I have earwax buildup from earplugs?
Common signs include a sense of fullness, muffled hearing, or mild discomfort. This should be evaluated and treated by a healthcare provider rather than addressed with cotton swabs, which can push wax further in.
Do earplugs help with a snoring partner specifically?
Yes, this is one of the most common practical uses, and the same noise-blocking mechanism behind the ICU research applies. If the snoring is loud, frequent, or accompanied by gasping, it's also worth having that person evaluated for sleep apnea, since earplugs address your sleep, not their underlying cause.
From Nuvirox
Why we formulated Sleep+ Restore
Earplugs address noise-driven sleep disruption, but they don't help your brain wind down before you even reach for them. Sleep+ Restore's melatonin-plus-botanical blend is built for the falling-asleep process itself — a useful complement to environmental fixes like earplugs, not a replacement for them.
Learn more about Sleep+ Restore →The bottom line
Earplugs have solid trial evidence behind their sleep benefits, largely from ICU research, and a real but modest downside in earwax buildup risk, extrapolated from hearing-aid research rather than earplug-specific studies. Used thoughtfully — the right material, the occasional night off, attention to your ears if something feels different — the benefit clearly outweighs the risk for most people dealing with a noisy sleep environment.
References
- Obanor OO, Bell CN, Nguyen HB, et al. (as cited under Foley/Lopez/Boncyk correspondence.) The impact of earplugs and eye masks on sleep quality in surgical ICU patients at risk for frequent awakenings. Crit Care Med. PMID: 33870919.
- Le Guen M, Nicolas-Robin A, Lebard C, Arnulf I, Langeron O. Earplugs and eye masks vs routine care prevent sleep impairment in post-anaesthesia care unit: a randomized study. Br J Anaesth. (crossover ICU polysomnography trial). PMC5696771.
- Hu RF, Jiang XY, Hegadoren KM, Zhang YH. Effects of earplugs and eye masks combined with relaxing music on sleep, melatonin and cortisol levels in ICU patients: a randomized controlled trial. Crit Care. 2015;19:115. doi:10.1186/s13054-015-0855-3.
- Schwartz SR, Magit AE, Rosenfeld RM, et al. Clinical practice guideline (update): earwax (cerumen impaction). Otolaryngol Head Neck Surg. 2017;156(1_suppl):S1-S29. PMID: 28045632.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.