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Sleeping with, or without, a pillow may have a sneaky impact on your health.

New research suggests that skipping the pillow could help prevent the development of glaucoma, an eye disease that damages the optic nerve and can cause vision loss or blindness.

Glaucoma can be caused by elevated eye pressure, thinning of the optic nerve or fluid buildup, according to the Glaucoma Research Foundation.

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The study, published in the British Journal of Ophthalmology, found that eye pressure was higher in glaucoma patients who slept with two pillows compared to lying flat. Blood flow to the eye decreased in the high-pillow position.

This may occur due to the neck bending forward, compressing the veins, the authors suggested. Glaucoma patients may benefit from avoiding sleep postures that put the neck in this position, they concluded.

Dr. William Lu, medical director at Dreem Health, who was not involved in the study, called these findings “interesting and important.”

“It highlights how something as simple as sleep posture can influence intra-ocular pressure in people with glaucoma,” the San Francisco-based expert told Fox News Digital.

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“That said, this is still early research, and it doesn’t mean pillows are inherently harmful – it’s more about how they’re used and the degree of elevation.”

The key takeaway is “balance and personalization,” Lu said. Most people don’t need to eliminate pillows, but should avoid “extreme positions,” such as sleeping with the head sharply elevated or with the neck bent at an awkward angle, he noted.

Sleeping without a pillow can help promote a more neutral neck alignment for some people, especially those who sleep on their backs, according to Lu.

“That can reduce strain on the cervical spine and may improve comfort or reduce morning stiffness,” he said. “In certain cases, it may also reduce pressure points that come from overly thick or unsupportive pillows.”

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Going pillow-free isn’t ideal for side sleepers, who often need a pillow to keep the head aligned with the spine, Lu added.

“Without one, the neck can tilt downward and create strain over time,” he said. “For others, skipping a pillow can worsen snoring or airway positioning, and people with existing neck or shoulder issues may actually feel worse without proper support.”

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For those who have glaucoma or are at higher risk, Lu recommends discussing sleep posture with a healthcare provider and aiming for a position that keeps the head and neck aligned without excessive elevation.

“Small adjustments in sleep setup can be a simple but meaningful way to support overall health,” he said.

In a separate interview with Fox News Digital, Dr. Saema Tahir, a board-certified sleep disorder specialist in New York City, said these findings align with prior research showing that “how you elevate your head matters.”

“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,” she said.

Tahir stressed that there is “very limited high-quality evidence” showing health benefits from sleeping without a pillow.

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“What matters most is maintaining proper alignment of the cervical spine, and that varies from person to person,” she said. “Without adequate support, especially for side sleepers, the neck can fall out of alignment.”

This can manifest as neck pain and stiffness, morning headaches, or shoulder and arm discomfort.

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“So, for many people, especially side sleepers, skipping a pillow can actually make sleep quality worse,” the expert said.

“For those with glaucoma or at risk should avoid sleeping face-down with pressure on the eyes and should be cautious with very high or stacked pillows … Be mindful of side sleeping, as the lower eye can experience higher pressure.”

While U.S. cancer deaths have been falling over the past couple of decades, certain parts of the country are seeing less improvement in those numbers.

New research published in the British Journal of Cancer assessed the differences in cancer mortality improvements across the country.

Researchers at Mississippi State’s Social Science Research Center, along with scientists at Oak Ridge National Laboratory, analyzed death certificates between 1981 and 2019 across nearly 3,000 U.S. counties.

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The data was drawn from Wide-Ranging Online Data for Epidemiologic Research (WONDER), which is operated by the CDC. More than 21.3 million cancer deaths were included in the records.

Overall, U.S. cancer mortality has declined by about 32% between 1991 and 2019, but not all areas experienced that level of improvement.

The highest rates of mortality decline and the biggest drop in excess deaths were seen in urban, coastal and higher-income counties, according to the study. Rural and lower-income counties had smaller declines in mortality.

“In a complex nation such as the U.S., we should not be too surprised that there are large differences in health outcomes shaped by the diversity and variety of local regions and groups,” Arthur G. Cosby, the study’s lead author, told Fox News Digital. He is a Giles Distinguished Professor Emeritus at Mississippi State. 

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“Cancer improvement over the last few decades certainly aligns with this perspective,” he said. 

The gap appeared to widen over time, researchers noted. By 2019, the top 10% highest-income counties had a roughly seven times greater mortality improvement than the lowest-income counties.

The large urban centers along both the Atlantic and Pacific coasts consistently had among the highest rates of cancer improvement, according to Cosby. Rural and smaller cities in the interior of the U.S. often had much lower rates.

“The magnitude of the mortality differences between coastal and inland regions, [and] the large differences between places with different income levels and rural/urban places, were larger than I anticipated,” Cosby said.

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“The link between improving health and increasing disparities is poorly understood. I am pursuing that question now,” he added.

The researchers pointed to several factors that could contribute to the declines in cancer mortality. These included a decline in tobacco use and improved cancer screenings and treatments.

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“Wealthy, metropolitan New York City has been aggressive in instituting tobacco control measures, and the results show,” Cosby noted. “Manhattan had a lung cancer rate of 49 per 100,000 in 1991. By 2019, it cut its rate to 19.6 — a 60% reduction.”

Dr. Marc Siegel, Fox News senior medical analyst, agreed that more aggressive preventive measures targeting smoking and alcohol use likely played a role in the sharper mortality decline in urban, affluent areas.

“More aggressive screening campaigns, including at major medical centers, can diagnose pre-cancers or cancers earlier,” Siegel, who was not involved in the study, told Fox News Digital.

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A focus on improved lifestyle habits and less exposure to environmental toxins could also play a role, he added.

The study had some limitations, as noted by the authors.

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Because the research was conducted at the county level, the results may not apply at the individual level. 

Also, unmeasured factors such as lifestyle behaviors and access to healthcare could impact mortality.

“There are many limitations associated with the use of death certificates in research, such as accuracy of cause of death, possible multiple causes and changes in medical explanation for death over time,” Cosby told Fox News Digital.

Based on the findings, the researchers are calling for more studies that take into account the significant variations that exist across the country.

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“The varying speed of adoption of life-saving interventions between geographic places may produce increasing disparities,” Cosby said. “It is possible to have a situation where nearly all places are improving their cancer mortality, but at much different rates.”