Sleeping Without a Pillow
The question of whether to use a pillow has been debated informally for years — but a landmark study published in the British Journal of Ophthalmology on January 27, 2026 has given that conversation an entirely new dimension. Researchers from Zhejiang University’s Eye Center in China found that sleeping without a pillow — or more precisely, avoiding a high-pillow sleeping posture — may meaningfully help lower intraocular pressure (IOP), the internal eye pressure whose buildup is the primary driver of glaucoma, the leading cause of irreversible blindness worldwide. The study, which was covered by Fox News Health and widely reported across major medical news platforms, studied 144 adults with glaucoma and measured their right-eye pressure every two hours over a 24-hour period, both while lying flat and while resting with heads elevated by two standard pillows at an angle of 20° to 35°. The findings showed that approximately two-thirds of participants experienced higher eye pressure when sleeping with pillows, with an average IOP increase of around 1.6 mm Hg in the high-pillow position. While this may sound like a small number, in the context of glaucoma — where any sustained increase in eye pressure can accelerate optic nerve damage — even modest nocturnal pressure elevations matter enormously.
What makes this research particularly compelling is its proposed mechanism. The researchers found that stacked pillows alter the angle of the neck in a way that may compress the jugular vein — the main vessel responsible for draining blood from the head — and this compression impairs the natural drainage of aqueous humor, the fluid that nourishes and maintains pressure within the eye. In a separate sub-study of 20 healthy volunteers, researchers confirmed that pillow use significantly narrowed the inner lumen of the jugular vein and increased blood flow speed, providing direct physiological evidence for the proposed mechanism. As Fox News Health reported, Dr. Raymond Lu, a San Francisco-based ophthalmologist, commented that the findings “highlight how something as simple as sleep posture can influence intra-ocular pressure in people with glaucoma.” New York City sleep disorder specialist Dr. Saema Tahir added that these findings align with prior research showing that how the head is elevated during sleep genuinely matters — noting that elevating the bed’s head itself may reduce eye pressure, but stacking multiple pillows can be counterproductive. Together, this growing body of sleep posture research points toward a broader truth: the simple act of how you rest your head each night has documented, measurable consequences for human health that medicine is only now beginning to fully map.
Key Facts & Highlights: Sleeping Without a Pillow – Health Benefits & Facts 2026
The table below captures the most important, verified facts about the health benefits and risks of sleeping without a pillow in the US in 2026, drawn from the landmark 2026 British Journal of Ophthalmology study, Glaucoma Research Foundation data, Sleep Foundation clinical guidance, and peer-reviewed medical literature.
| Fact | Detail |
|---|---|
| Study Published | British Journal of Ophthalmology — January 27, 2026 |
| Study DOI | 10.1136/bjo-2025-328037 |
| Study Title | “Association of high-pillow sleeping posture with intraocular pressure in patients with glaucoma” |
| Funding | Key Research and Development Program of Zhejiang Province, China |
| Lead Institution | Eye Center, Zhejiang University, Second Affiliated Hospital, School of Medicine; Zhejiang Provincial Key Laboratory of Ophthalmology |
| Total Participants (Glaucoma Group) | 144 adults with glaucoma |
| Age Groups in Study | 84 aged ≤44; 41 aged 45–59; 19 aged 60 and above |
| Types of Glaucoma Represented | 70 normal tension glaucoma; 9 elevated eye pressure glaucoma; 65 primary open-angle glaucoma (POAG) |
| Study Period | October 2023 – April 2024 |
| IOP Measurement Frequency | Every 2 hours over a 24-hour period — both sitting and lying down |
| Pillow Elevation Tested | 2 standard pillows — head elevation of 20° to 35° (approx. 8 to 14 inches, depending on body size) |
| Key Finding | Approximately two-thirds of participants had higher eye pressure when sleeping with pillows |
| Average IOP Increase with Pillows | Around 1.6 mm Hg higher in the high-pillow position |
| Additional Measure Affected | Ocular Perfusion Pressure (OPP) also decreased with pillow use — low OPP linked to worsening glaucoma |
| Subgroup Finding — Young Adults | Younger adults were much more likely to experience significantly greater IOP increase than older adults with pillow use |
| Subgroup Finding — POAG | Those with primary open-angle glaucoma had the highest changes in IOP with pillow use |
| Jugular Vein Sub-Study | 20 healthy volunteers studied — pillow use narrowed jugular vein lumen and significantly increased blood flow speed |
| Proposed Mechanism | Pillows compress jugular vein → impairs drainage of aqueous humor → raises intraocular pressure (IOP) |
| Study Type | Observational study — cannot prove direct cause and effect |
| Researcher Recommendation | Avoid sleeping postures that cause jugular venous compression to help manage nocturnal IOP |
| US Glaucoma Prevalence | Approximately 4.22 million people in the US have glaucoma (JAMA Ophthalmology, published October 2024) |
| Unaware of Condition (US) | Nearly half of all US glaucoma patients are unaware of their condition |
| Global Glaucoma Prevalence | Approximately 80 million people worldwide have glaucoma (Glaucoma Research Foundation) |
| Glaucoma: Global Blindness Rank | Leading cause of irreversible blindness worldwide — responsible for 9% to 12% of all blindness cases |
| Glaucoma — Global Burden by 2040 | Expected to increase to over 111 million people with glaucoma by 2040 |
| Glaucoma Blind by 2040 (Projection) | Estimated 22 million people worldwide will be blind from glaucoma by 2040 |
| Glaucoma US Economic Cost | $2.86 billion every year in direct costs and productivity losses |
| African Americans and Glaucoma | Glaucoma-related blindness is 6 to 8 times more prevalent in African Americans than Caucasians |
| Open-Angle Glaucoma in African Americans | 3 to 4 times more common than in non-Hispanic whites — leading cause of blindness in African Americans |
| Who Benefits from No Pillow | Stomach sleepers — no pillow helps keep neck and spine in more neutral alignment |
| Who Should Keep Using a Pillow | Side sleepers and back sleepers — generally need pillow support to maintain spinal alignment |
| Best Sleep Position for Back Sleepers | Medium-firm, lower pillow to prevent head from tilting back and arching the spine |
| Side Sleeper Pillow Need | Thick pillow to fill gap between head and mattress — without it, neck bends sideways causing strain |
| Stomach Sleeper Recommendation | University of Rochester Medical Center: flat pillow or none recommended |
| Skin Benefit Claim | Pillows can compress skin → contribute to sleep wrinkles over time — limited clinical evidence |
| Transition Tip for Going Pillow-Free | Start with a folded blanket, gradually reduce height over time rather than switching abruptly |
| Fox News Health Expert — Dr. Raymond Lu | San Francisco ophthalmologist: findings show “sleep posture can influence intra-ocular pressure in people with glaucoma” |
| Fox News Health Expert — Dr. Saema Tahir | NYC sleep disorder specialist: “Elevating the head of the bed itself can reduce eye pressure, but using multiple pillows may not have the same effect — and could even be counterproductive in some cases” |
| Very Limited Evidence | Dr. Tahir: there is “very limited high-quality evidence” showing health benefits from sleeping without a pillow — findings are early-stage |
| Practical Guidance for Glaucoma Patients | Avoid sleeping face-down with pressure on eyes; be cautious with very high or stacked pillows; be mindful of side sleeping as lower eye can experience higher pressure |
Source: British Journal of Ophthalmology — “Association of High-Pillow Sleeping Posture with Intraocular Pressure in Patients with Glaucoma,” Published January 27, 2026 (DOI: 10.1136/bjo-2025-328037); BMJ Group — Official Press Release, January 28, 2026
The two facts in this table that deserve the most careful attention are also the two most frequently overlooked in popular coverage of this study. First, approximately half of all 4.22 million US glaucoma patients are unaware they have the condition — meaning that for millions of Americans who silently carry elevated intraocular pressure, a sleep posture adjustment they could make tonight might be providing either marginal protection or additional risk depending on whether they stack their pillows. Second, and equally important, the study’s own researchers were transparent that this was an observational study that cannot prove cause and effect. The mechanism is plausible, the data is directionally clear, and the signal is consistent — but the number of participants in each subgroup was relatively small, and further research with randomized designs is needed before pillow-free sleep can be formally recommended as a clinical intervention for glaucoma management. Dr. Tahir’s caution about the “very limited high-quality evidence” is not a dismissal of the findings — it is an honest calibration that the medical community applies to all preliminary research before it enters clinical guidelines.
The scale of the glaucoma burden worldwide gives this research its real-world urgency. With 80 million people currently living with glaucoma globally and that number projected to exceed 111 million by 2040, any simple, low-cost behavioral modification that might help reduce the disease’s progression or lower the IOP burden in already-affected patients deserves serious scientific attention. The fact that glaucoma costs the US economy $2.86 billion per year in direct costs and productivity losses — while simultaneously remaining the leading cause of irreversible blindness worldwide — makes the economic case for preventive behavioral interventions particularly strong. Sleep posture costs nothing to adjust. If well-designed clinical trials confirm what this preliminary study suggests, it would represent one of the most accessible, cost-effective adjunctive strategies in all of glaucoma management.
The Science: How Pillow Use Affects Eye Pressure
The 2026 British Journal of Ophthalmology study is built on a precise physiological chain of events that connects pillow use to eye health in a way that is both anatomically plausible and directly measurable. The table below details the key scientific mechanism and study design data.
| Scientific Parameter | Data / Finding |
|---|---|
| Intraocular Pressure (IOP) Definition | The internal pressure of the eye — formally known as intraocular pressure (IOP) |
| IOP and Posture | IOP fluctuates in response to body posture changes — transitioning from upright to supine (lying flat) is the primary driver of nocturnal IOP increase |
| Primary Nocturnal IOP Contributor | The transition from upright to supine position during sleep is the primary contributor to IOP increase at night |
| Aqueous Humor Function | Fluid that nourishes eye tissues without a blood supply — including the cornea and lens — and helps maintain eye shape and pressure |
| What Pillow Use Does to the Neck | Stacked pillows alter neck position, potentially compressing the jugular vein — the main drain of blood from the head |
| Jugular Compression Effect | Jugular compression prevents the natural drainage of aqueous humor, raising eye pressure |
| Pillow Elevation in Study | Two standard-sized pillows — providing head elevation of 20° to 35° |
| IOP Measurement Timing | Measured every 2 hours over 24 hours, both seated and supine; with pillows re-measured 10 minutes after head elevation |
| Measurement Cycle | Each participant completed four full sets of measurements — alternating with and without pillows |
| IOP Increase (Average) | Average increase of approximately 1.6 mm Hg in high-pillow position vs. lying flat |
| Participants with Higher IOP (Pillows) | Approximately two-thirds (~66%) of the 144 glaucoma participants had higher IOP with pillows |
| Normal IOP Range | Typically 10 to 21 mm Hg — elevated IOP considered a primary risk factor for glaucoma |
| Why 1.6 mm Hg Matters | For glaucoma patients, even small sustained IOP increases can accelerate optic nerve damage — the irreversible mechanism of vision loss |
| Ocular Perfusion Pressure (OPP) | Also decreased in high-pillow position — low OPP independently associated with worsening glaucoma |
| Jugular Vein Lumen Study | Among 20 healthy volunteers: pillow use caused significantly narrower internal vein diameter (lumen restriction) |
| Blood Flow Speed with Pillows | Blood flow was significantly faster with pillows — a sign of increased vascular resistance from compression |
| Jugular Vein Blood Flow Without Pillows | Lumen was much less restricted, blood flow was more normal — suggesting better venous drainage |
| Most Affected Group | Young adults (≤44) — significantly greater IOP increase than those 45–59 or 60+ |
| Most Affected Glaucoma Subtype | Primary open-angle glaucoma (POAG) — most common form; highest IOP changes with pillow use |
| Least Affected Group | Older adults (60+) — smaller IOP response to pillow elevation |
| Researchers’ Conclusion | “Patients with glaucoma may benefit from avoiding sleeping postures that induce jugular venous compression to mitigate postural IOP elevation” |
| Positioning as Strategy | Study describes positional modification as “a plausible strategy warranting further investigation” alongside medications and laser therapy |
| Traditional IOP Management Limitation | Current nocturnal IOP management is “primarily limited to increasing the types and frequency of IOP-lowering medications or supplementary laser therapy” |
| Observational Study Limitation | Cannot prove cause and effect — sample sizes in subgroups are relatively small — further research required |
Source: British Journal of Ophthalmology — “Association of High-Pillow Sleeping Posture with Intraocular Pressure in Patients with Glaucoma,” January 27, 2026 (DOI: 10.1136/bjo-2025-328037)
What the researchers at Zhejiang University have established here is not simply an opinion about pillows — it is a measurable, physiologically grounded chain of events with data attached to each link. The jugular vein sub-study involving 20 healthy volunteers is particularly important because it provides direct anatomical evidence for the proposed mechanism rather than relying on correlation alone. When researchers observed that pillow use caused the jugular vein’s inner diameter to narrow significantly — with blood simultaneously moving faster through a tighter channel — they were seeing the physiological signature of vascular compression in real time. That compression, the researchers argue, backs up fluid pressure in the venous system that drains the eye, impairing aqueous humor outflow and raising IOP. The fact that this was demonstrated in healthy volunteers with no glaucoma, not just in patients already predisposed to high eye pressure, strengthens the biological plausibility of the mechanism considerably.
The differentiation between age groups is one of the study’s most clinically interesting findings and one of the least discussed in popular coverage. Young adults (aged 44 and under) showed significantly greater IOP increases with pillow use than older adults — a counterintuitive finding given that glaucoma is more commonly associated with older populations. One proposed explanation is that vascular elasticity and jugular venous tone differ across age groups, and younger patients’ veins may respond more acutely to positional compression. For clinicians managing primary open-angle glaucoma in younger patients — a population that faces the most years of potential optic nerve exposure to elevated pressure — the implication is that sleep posture counseling might be particularly valuable precisely in the patient group that is often least prioritized for behavioral interventions. The researchers themselves noted that this finding warrants specific follow-up investigation, and the study’s DOI is now actively referenced in ophthalmology literature as a foundation for that future work.
Sleeping Without a Pillow: Benefits by Sleep Position
The health effects of going pillow-free are highly dependent on how a person sleeps. There is no universal answer — the research is clear that pillow use helps certain sleepers and may harm others. The table below maps the evidence by sleep position.
| Sleep Position | Pillow Recommendation | What Happens Without a Pillow | Clinical Guidance |
|---|---|---|---|
| Stomach Sleeper | Best candidate for no pillow | Head stays closer to neutral alignment; reduces neck strain from head turning side to side | University of Rochester Medical Center: flat pillow or none recommended for stomach sleepers |
| Stomach Sleeper — Spinal Note | Some benefit in spine alignment | Sleeping on stomach still forces neck to turn — even without a pillow, neck pain is not fully avoided | A thin pillow under the hips can help lift midsection and encourage straighter spine for stomach sleepers |
| Back Sleeper | Low-to-medium pillow recommended | Without a pillow, head may tilt backward, unnaturally arching the spine and creating neck pressure | Medium-firm pillow keeps head slightly elevated, spine straight; no pillow can cause head tilt and pressure on cervical area |
| Side Sleeper | Thick pillow strongly recommended | Without a pillow, neck bends downward toward the mattress — overextension almost certain | Gap between head and mattress on the side requires a tall-enough pillow to keep nose aligned with center of chest |
| Side Sleeper — Eye Note | Extra caution — lower eye may experience higher pressure | When side sleeping, the eye nearest the mattress faces added gravitational and compression pressure | Glaucoma patients: Dr. Lu advises “be mindful of side sleeping, as the lower eye can experience higher pressure” |
| Back Sleeper — Glaucoma Note | Avoid face-down; be cautious with stacked pillows | High pillow compresses jugular vein, raises IOP — even back sleeping with stacked pillows poses this risk | Glaucoma patients should align head and neck without excessive elevation; discuss with healthcare provider |
| Stomach Sleeper — Glaucoma Note | Avoid face-down pressure on eyes | Pressure on the eyes directly while face-down may elevate IOP regardless of pillow use | Researchers specifically warn: avoid sleeping face-down with pressure on the eyes |
| General Recommendation (Non-Glaucoma) | Depends on sleep position and mattress | Most people don’t need to eliminate pillows — avoiding extreme positions is the key | Dr. Raymond Lu, Fox News Digital: most people don’t need to eliminate pillows — avoid “extreme positions” such as sleeping with the head sharply elevated or neck bent at an awkward angle |
| Glaucoma Risk Population | Extra care with pillow height | High or stacked pillows specifically associated with increased IOP | For those with or at risk of glaucoma: “Avoid sleeping face-down with pressure on the eyes and should be cautious with very high or stacked pillows” — Dr. Lu, Fox News Digital |
| Transition Strategy (If Trying No Pillow) | Gradual reduction recommended | Sudden shift from thick pillow to no pillow can cause discomfort and adjustment pain | Start with a folded blanket or thin sheet; gradually reduce height over time until comfortable on flat surface |
| Mattress Compatibility | Critical if sleeping without a pillow | A mattress that is too soft can cause spine to sink into unnatural position without pillow support | Medium-firm mattress works best without a pillow — prevents excessive pressure on neck and back |
| Body Pillow Alternative | Useful for stomach sleepers reducing head pillow | Hugging a large body pillow maintains some pressure sensation on the stomach while head is flat | Sleep Foundation: stomach sleepers can try a thin pillow beneath the hips alongside no head pillow |
| Cervical Pillow Option (Back/Side) | Better alternative to no pillow for most | Contoured cervical pillows maintain natural neck curve — higher edges for side, lower center for back | Considered superior to both flat pillow and no pillow for back and side sleepers with neck concerns |
Source: Sleep Foundation — “Sleeping Without a Pillow” (Updated 2026); Medical News Today — “Sleeping Without a Pillow: Benefits and Risks”; Casper Blog — “Sleeping Without a Pillow: Is It Bad for You?” (Updated March 5, 2026)
The sleep position dimension is where the evidence on pillow-free sleeping gets genuinely nuanced — and where the common-sense appeal of “just ditch the pillow” can collide painfully with anatomical reality. The Sleep Foundation’s analysis is clear: for the vast majority of back sleepers and side sleepers, removing the pillow creates rather than resolves a problem. A back sleeper lying flat without any head support experiences a subtle but real backward tilt of the head, which creates a sustained extension force on the cervical spine that, over eight hours of sleep, produces the kind of morning neck stiffness that most people would wrongly blame on their mattress. Side sleepers face an even more mechanical problem: the gap between the head and the mattress when lying on one’s side — which varies by shoulder width — has to be bridged by something, or the neck bends sharply downward and stays there all night. The physiological stress on the lateral neck muscles and cervical facet joints from that position is well-documented in the literature, and it does not resolve on its own.
Stomach sleepers are a genuinely different case — and the one where the evidence for going pillow-free is most compelling. Because stomach sleeping already forces the neck into a rotated position (the head must turn to one side to breathe), adding a standard pillow beneath the head elevates the face and increases the cervical rotation angle, compounding the stress on the neck and upper thoracic spine. A flat surface — or a very thin pillow — actually reduces that compound angle and brings the neck marginally closer to neutral. The University of Rochester Medical Center’s recommendation of “flat pillow or none” for stomach sleepers reflects a clinical consensus that has been consistent for years. The new glaucoma research’s warning against sleeping face-down with direct pressure on the eyes is an important addendum for glaucoma patients specifically — because even without a head pillow, the eye that is nearest the mattress when lying face-down is subject to both gravitational and physical pressure that could independently elevate IOP in a way that has nothing to do with jugular vein compression.
Glaucoma Facts & Statistics in the US 2026
The glaucoma context is what gives the 2026 pillow study its genuine public health relevance. Understanding how widespread, serious, and silent glaucoma is helps explain why even a modest, preliminary behavioral finding about sleep posture deserves careful scientific follow-up. The table below compiles verified glaucoma statistics from official health organizations.
| Glaucoma Statistic | Data | Source |
|---|---|---|
| US Glaucoma Prevalence (2022 data, published 2024) | Approximately 4.22 million people in the US | JAMA Ophthalmology, October 17, 2024 |
| US Glaucoma Patients Unaware of Condition | Nearly half — approximately 50% | Glaucoma Research Foundation |
| Global Glaucoma Prevalence (current) | Approximately 80 million people worldwide | Glaucoma Research Foundation |
| Global Glaucoma Cases (2020 projection, prior estimate) | Approximately 76 to 79.6 million | Tham et al., Ophthalmology 2014; Meta-analysis |
| Global Glaucoma Projection by 2040 | Over 111 million people | Tham et al. systematic review; Glaucoma Research Foundation |
| Global Glaucoma Blind by 2040 (Projection) | Estimated 22 million worldwide | Glaucoma Research Foundation |
| Glaucoma as Cause of Blindness (Global) | Leading cause of irreversible blindness worldwide — responsible for 9% to 12% of all blindness cases | Glaucoma Research Foundation; WHO |
| Glaucoma Global Blindness Rank | Second leading cause of all blindness (after cataracts) — first in irreversible blindness | WHO; Glaucoma Research Foundation |
| Open-Angle Glaucoma (POAG) — Global | Estimated 57.5 to 68.56 million people affected by POAG globally | PMC Epidemiology of Glaucoma; Nature Eye meta-analysis |
| US Glaucoma Economic Burden | $2.86 billion per year in direct costs and productivity losses | BrightFocus Foundation / National Glaucoma Research |
| Routine Eye Exam Awareness | Survey of 1,000+ participants by Glaucoma Research Foundation: 74% aware routine eye exams can detect glaucoma | Glaucoma Research Foundation |
| African Americans — Glaucoma Blindness Risk | Glaucoma-related blindness 6 to 8 times more prevalent than in Caucasians | Glaucoma Research Foundation |
| POAG in African Americans | 3 to 4 times more common than in non-Hispanic whites — leading cause of blindness in African Americans | National Glaucoma Research |
| High-Risk Groups | People over 60, those with family history of glaucoma, diabetics, and those with severe nearsightedness | Glaucoma Research Foundation |
| Glaucoma in Developed Countries | Only 5% of glaucoma patients in developed countries experience vision deterioration severe enough for legal blindness | Glaucoma Research Foundation |
| Glaucoma — Nature of Vision Loss | Vision loss from glaucoma is silent, slow, progressive, irreversible — but treatable | Glaucoma Research Foundation |
| Current Treatment Options | No cure for glaucoma — treatments lower IOP to slow progression; include eye drops, laser therapy, surgery | Glaucoma Research Foundation; British Journal of Ophthalmology study 2026 |
| Most Common Form | Primary open-angle glaucoma (POAG) — often linked to impaired aqueous humor drainage | British Journal of Ophthalmology study 2026; Glaucoma Research Foundation |
| Glaucoma in Study — POAG Group | 65 of 144 participants had POAG — most affected by high-pillow IOP increase | British Journal of Ophthalmology, January 27, 2026 |
| Normal Tension Glaucoma Group in Study | 70 of 144 participants — also showed IOP changes with pillows | British Journal of Ophthalmology, January 27, 2026 |
| Aqueous Humor Role | Nourishes eye tissues without blood supply (cornea, lens); maintains eye shape and pressure — drainage impairment = IOP rise | British Journal of Ophthalmology study 2026 |
| IOP Screening Importance | High IOP often has no symptoms — can only be detected by tonometry in a comprehensive eye exam | Glaucoma Research Foundation; National Glaucoma Research |
| Those with High IOP: Exam Frequency | Those at high risk should have a dilated eye exam and visual field test at least every 1 to 2 years | National Glaucoma Research |
Source: Glaucoma Research Foundation — “Facts and Stats” and “Glaucoma Worldwide: A Growing Concern”; BrightFocus Foundation — National Glaucoma Research “Facts & Figures”; JAMA Ophthalmology — “Prevalence of Glaucoma Among US Adults in 2022” (Published October 17, 2024, DOI: 10.1001/jamaophthalmol.2024.3884); Prevent Blindness — “New Study Finds Higher Prevalence of Glaucoma Than Previously Estimated” (October 2024); World Health Organization — “Vision Impairment and Blindness” (Updated February 2026); Tham et al. — “Global Prevalence of Glaucoma and Projections of Glaucoma Burden through 2040” (Ophthalmology, 2014; British Journal of Ophthalmology, January 27, 2026)
The glaucoma statistics above reframe the pillow study from a curious lifestyle curiosity into something with genuine public health stakes. 4.22 million Americans carry this diagnosis — and nearly half of them, approximately 2 million people, do not even know they have the condition. They are accumulating optic nerve damage silently, on a nightly basis, potentially compounded by sleeping habits that no clinician has ever discussed with them. That is not a reflection of medical negligence — it is a reflection of how new this line of research is. Until the January 2026 British Journal of Ophthalmology publication, no clinical guideline in any major ophthalmology society included sleep posture or pillow use as a consideration in glaucoma management. The study changes that conversation, even if it cannot yet change the guidelines.
The $2.86 billion annual US economic burden of glaucoma gives this behavioral research an additional dimension beyond the individual patient. If routine counseling about sleep posture could reduce even a fraction of the nocturnal IOP burden in high-risk patients — potentially slowing progression, reducing medication escalation, or delaying the need for laser or surgical intervention — the downstream economic savings could be meaningful over a patient’s lifetime. The fact that the proposed behavioral adjustment (avoiding high-stacked pillows; sleeping in a posture that does not compress the jugular vein) costs absolutely nothing to implement makes it an exceptionally attractive public health intervention to study further. The researchers at Zhejiang University were careful to frame their findings as preliminary and observational — but they were equally clear that the biological plausibility is strong, the mechanism is directly measurable, and the potential for this to become a genuine adjunctive management tool for the 80 million people worldwide living with glaucoma is real.
Health Risks of Sleeping Without a Pillow
Sleeping without a pillow is not inherently beneficial — and for many people it carries documented risks that are just as real as any proposed benefits. The table below captures the evidence-based downsides and contraindications.
| Risk / Consideration | Detail | Who Is Most Affected |
|---|---|---|
| Neck Pain — Back Sleepers | Without a pillow, the head tilts backward, placing sustained extension stress on the cervical spine | Back sleepers — strong pillow recommended |
| Neck Pain — Side Sleepers | Without pillow, the neck bends sharply toward the mattress — overextension almost certain | Side sleepers — thick, firm pillow recommended |
| Spinal Misalignment | No pillow forces the spine out of neutral alignment for most sleepers — can cause morning stiffness and pain | Back and side sleepers |
| Worsening Back Pain | Poor spinal alignment from no pillow → muscle tension → back pain throughout the day | Back and side sleepers especially |
| Tension Headaches | Neck muscle overextension during sleep without a pillow → cervical tension headaches on waking | Predominantly back and side sleepers |
| Neck Stiffness | Sustained abnormal neck position during sleep causes cervical muscle stiffness | All non-stomach sleepers |
| Sleep Quality Disruption | Spinal and neck discomfort from improper alignment causes waking during the night → sleep loss | Any sleeper with poor alignment |
| Sleep Apnea Risk | Back sleepers using an especially thick pillow can develop obstructive sleep apnea; no pillow increases the risk of head tilting further back | Back sleepers particularly |
| Heartburn / Acid Reflux | Sleeping flat without pillow elevation can worsen gastroesophageal reflux (GERD) — some elevation is recommended | People with GERD or acid reflux |
| Pregnancy | Flat sleeping (no pillow) is generally not recommended — specialized support is needed | Pregnant women |
| Glaucoma — Face-Down Risk | Sleeping face-down with direct pressure on the eyes may elevate IOP regardless of pillow use | Glaucoma patients, those at risk |
| Glaucoma — Side Sleeping Risk | The lower eye when side sleeping can experience higher IOP from gravitational pressure | Glaucoma patients |
| Obstructive Sleep Apnea | People with diagnosed OSA often benefit from head/neck elevation — removing pillow counterproductive | OSA patients |
| Snoring | Flat position without pillow elevation can worsen snoring in susceptible individuals | Snorers; those with airway anatomy concerns |
| Skin Compression | Ironic twist: while some claim no pillow reduces wrinkles, sleeping face-down without pillow may compress the face differently | Stomach sleepers without a pillow |
| Research Limitation | Sleep Foundation notes: “Clinical studies are lacking when it comes to the advantages and disadvantages of sleeping without a pillow” | All — the evidence base is early-stage |
| Evidence Quality Warning | Dr. Saema Tahir (Fox News Digital): there is “very limited high-quality evidence” showing health benefits from sleeping without a pillow | General public — expectation management needed |
Source: Sleep Foundation — “Sleeping Without a Pillow” (2026); Medical News Today — “Sleeping Without a Pillow: Benefits and Risks”; Casper Blog — Updated March 5, 2026; Apollo247 Health Guide — “Benefits of Sleeping Without a Pillow” (January 2026); Fox News Health / AOL Health — Dr. Saema Tahir Commentary; PubMed — “Effect of Pillow on Pain, Disability and Sleep Quality in Patients with Chronic Neck Pain: A Systematic Review” (Rehabilitacion, July–September 2025, DOI: 10.1016/j.rh.2025.100922); PMC — “Examining Relationships Between Sleep Posture, Waking Spinal Symptoms and Quality of Sleep: A Cross-Sectional Study”
The risks of sleeping without a pillow for the wrong type of sleeper are not trivial or theoretical — they are backed by the same body of sleep science and musculoskeletal medicine that informs how physical therapists and sleep specialists advise patients recovering from neck injuries or managing chronic spinal pain. The July 2025 systematic review published in Rehabilitacion — “Effect of Pillow on Pain, Disability and Sleep Quality in Patients with Chronic Neck Pain” — is the most recent peer-reviewed analysis of this topic, and its findings are consistent with the broader literature: appropriate pillow use is a clinically meaningful tool for spinal alignment and sleep quality in patients already experiencing neck pain, and the removal of that support introduces biomechanical stresses that can worsen existing conditions. For the general, healthy public, the question of pillow use is more about optimization than risk avoidance — but for anyone with existing neck or back pathology, acid reflux, obstructive sleep apnea, or glaucoma, any change to sleep setup should be discussed with a healthcare provider before being attempted independently.
The Sleep Foundation’s frank acknowledgment that “clinical studies are lacking” on the advantages and disadvantages of sleeping without a pillow is one of the most honest statements in this entire topic area. The popular wellness internet is filled with confident claims about pillow-free sleeping improving posture, skin, hair, and facial structure — most of which have essentially no peer-reviewed evidence supporting them. What the evidence does support, specifically and carefully, is: stomach sleepers do better with flat or no pillow; back and side sleepers do worse without proper support; and — as of the January 2026 British Journal of Ophthalmology study — glaucoma patients who sleep with two stacked pillows may be incurring a measurable, mechanistically plausible increase in eye pressure during the hours when their optic nerves are most vulnerable. That last finding is the most medically significant thing the sleep-without-a-pillow conversation has ever produced, and it is the reason this line of research deserves the continued scientific investment the study authors explicitly called for in their conclusion.
Disclaimer: The data research report we present here is based on information found from various sources. We are not liable for any financial loss, errors, or damages of any kind that may result from the use of the information herein. We acknowledge that though we try to report accurately, we cannot verify the absolute facts of everything that has been represented.
