Health
Sleep deprivation dangers: How pulling an all-nighter affects your physical and mental health
Most people have sacrificed sleep at some point, but those extra waking hours could come at a price.
While it can be tempting to burn the midnight oil — whether it’s to get some work done, knock out a home project or care for a loved one — forgoing rest can wreak havoc on your health.
Fox News Digital spoke to experts about the short- and long-term effects of pulling an all-nighter — and how to rebound after a period of missed sleep.
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Here’s a deep dive.
What does staying up all night do to the body?
Pulling an all-nighter can have several impacts on the body, both physically and mentally, according to Dr. Leah Joseph, a primary care physician with New York-based Teladoc Health.
Pulling an all-nighter can have several impacts on the body, both physically and mentally, doctors warned. (iStock)
“The physical effects include weakening your immune system, which makes you more susceptible to illnesses,” she told Fox News Digital.
“Your body may also release a higher level of cortisol, which leads to elevated stress levels.”
In addition, sleep deprivation can result in impaired memory, concentration and overall cognitive function, Joseph noted.
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“The mental effects include mood changes, which can contribute to irritability, anxiety or depression,” she said.
“It also affects your decision-making, as your judgment may be negatively affected.”
Alex Dimitriu, M.D., who is double board-certified in psychiatry and sleep medicine and is founder of Menlo Park Psychiatry & Sleep Medicine in California, also warned of adverse effects.
“Even a single night of insufficient sleep leads to a buildup of toxins in the brain similar to those seen in people with Alzheimer’s disease.”
“There is evidence that even a single night of insufficient — or worse yet, absent — sleep leads to a buildup of toxins in the brain similar to those seen in people with Alzheimer’s disease,” he told Fox News Digital.
“Similar to Alzheimer’s, even one night of lost sleep can cause fatigue, impaired impulse control, mood instability, diminished attention and memory — all symptoms similar to ADHD.”
Staying up all night can significantly disrupt your sleep schedule and circadian rhythm, a doctor warned. (iStock)
“Underslept” people are more likely to suffer from a variety of psychiatric conditions, Dimitriu said.
Those include depression, anxiety, substance use, memory impairment and possibly an eventual increased risk of dementia.
“The brain needs sleep to clean up and reset,” he said.
Physically, lost sleep causes increased carb craving, diminished immunity and increased stress hormones, such as cortisol and adrenaline, he added.
“The brain needs sleep to clean up and reset.”
“The increased stress hormones, in turn, can elevate heart rate, blood pressure and blood sugar.”
Is an occasional all-nighter safe?
While pulling an occasional all-nighter may include include fatigue, irritability, impaired cognitive function and a temporary disruption of the sleep-wake cycle, Joseph said it may not cause significant long-term damage on its own.
Consistently skipping sleep over an extended period can lead to chronic sleep deprivation, which can have severe consequences over time. (iStock)
“Occasional all-nighters may not cause significant long-term damage if followed by sufficient recovery sleep,” she said. “The human body is resilient and can generally recover from short-term sleep deprivation.”
Consistently skipping sleep over an extended period can lead to chronic sleep deprivation, however, which can have more severe consequences over time.
Those impacts can include an increased risk of cardiovascular disease, diabetes, obesity, impaired immune function and mental health issues, Joseph said.
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Sleep deprivation will affect different people in different ways, she noted, as individual factors and resilience play a role.
“An all-nighter never killed anyone,” Dimitriu agreed. “However, they add up, and you will still feel miserable after a night of no sleep, and will not perform at your best.”
The physical effects of all-nighters include weakening of the immune system, which makes people more susceptible to illness. (iStock)
What to do after an all-nighter
Staying up all night can significantly disrupt your sleep schedule and circadian rhythm, Joseph said.
“The circadian rhythm is a natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours,” the doctor said.
“When you stay up all night, you throw off this cycle, leading to several potential effects on your sleep schedule.”
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After pulling an all-nighter, it may take some time for the body to readjust, and this can lead to temporary insomnia or difficulties falling asleep at the usual time, according to Joseph.
“Some potential effects that someone can suffer from include delayed sleep onset, irregular sleep patterns, increased sleep debt and difficulty regaining normalcy,” she said.
Exposure to morning sunlight can help regulate the circadian rhythm and get back to a regular sleep schedule, experts say. (iStock)
To mitigate the impact on your sleep schedule, prioritize getting back on track as soon as possible, said Joseph.
Some strategies include shifting to an earlier bedtime, spending time outdoors during daylight hours to help regulate your circadian rhythm, and establishing a consistent sleep routine by going to bed and waking up at the same time each day, according to Joseph.
“Personally, I also like to limit caffeine close to bedtime and stay hydrated,” she said. “If I do need a nap, I limit it to 20 to 30 minutes.”
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Dimitriu also recommended getting some sunlight exposure in the morning to reset your rhythm.
“Morning light is really important to getting you to bed at night,” he said.
Getting outdoor physical activity during the day, eating a light dinner and going to bed a little earlier than usual can also help regulate sleep cycles, the doctor advised.
“Prioritizing regular, sufficient sleep is essential for your overall well-being,” a doctor advised. (iStock)
Both experts agreed that the best strategy is to plan for healthy sleep and avoid all-nighters.
“Your performance after a night of not sleeping can be markedly diminished,” Dimitiu said. “All-nighters are often the result of poor planning, so try to plan ahead and avoid nights of lost sleep.”
Joseph added, “While occasional all-nighters may not have severe long-term consequences, making them a habit can contribute to health issues over time.”
“Prioritizing regular, sufficient sleep is essential for your overall well-being.”
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The key to feeling better in a fast, overstimulated world might be surprisingly simple: Live a little more like your grandparents.
A growing social media trend, dubbed “nonnamaxxing,” draws inspiration from the slower, more intentional rhythms associated with an Italian grandmother.
The lifestyle is often linked to activities like preparing home-cooked meals, spending time outdoors and making meaningful connections.
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“Nonnamaxxing is a 2026 trend that embraces the slower, more intentional lifestyle of an Italian grandmother (a Nonna). Think cooking from scratch, long family meals, daily walks, gardening and less screen time,” Erin Palinski-Wade, a New Jersey-based registered dietitian, told Fox News Digital.
Nonnamaxxing, derived from the name for an Italian grandmother, is a trend that incorporates lifestyle habits hundreds of years in the making. (iStock)
Stepping away from screens and toward real-world interaction can have measurable benefits, according to California-based psychotherapist Laurie Singer.
“We know that interacting with others in person, rather than spending time on screens, significantly improves mental health,” she told Fox News Digital, adding that social media often fuels comparison and lowers self-esteem.
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Living more like previous generations isn’t purely driven by nostalgia. Cooking meals from scratch, for example, has been linked to better nutrition and more mindful eating patterns.
Adopting traditional mealtime habits can improve diet quality and support both physical and mental health, especially when meals are shared regularly with others, Palinski-Wade noted.
One longevity expert stresses that staying healthy isn’t just about food — it’s also about joy and community. (iStock)
There’s also a psychological benefit to slowing down and focusing on one task at a time. Anxiety often stems from unfinished or avoided tasks, Singer noted, and engaging in hands-on activities can counteract that.
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“Nonnamaxxing encourages us to be present around a task, like gardening, baking or knitting, or just taking a mindful walk, that delivers something ‘real,’” she said.
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Palinski-Wade cautions against turning the trend into another source of pressure, noting that a traditional “nonna” lifestyle often assumes a different pace of life.
The key, she said, is adapting the mindset, not replicating it perfectly.
Nonnamaxxing, derived from the name for an Italian grandmother, is a trend that incorporates lifestyle habits hundreds of years in the making. (iStock)
The goal is to reintroduce small, intentional moments that make you feel better.
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That might mean prioritizing a few shared meals each week, taking a walk without your phone or setting aside time for a simple hobby, the expert recommended.
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Singer added, “Having a positive place to escape to, through whatever activities speak to us and make us happy, isn’t generational – it’s human.”
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Feeling lonely may take a toll on older adults’ memory — but it may not speed up cognitive decline, according to a new study.
Researchers from Colombia, Spain and Sweden analyzed data from more than 10,000 adults ages 65 to 94 across 12 European countries and found those who reported higher levels of loneliness did worse on memory tests at the start of the study, according to research published this month in the journal Aging & Mental Health.
Over a seven-year period, however, memory decline occurred at a similar rate regardless of how lonely participants felt.
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“The finding that loneliness significantly impacted memory, but not the speed of decline in memory over time was a surprising outcome,” lead author Dr. Luis Carlos Venegas-Sanabria of the School of Medicine and Health Sciences at the Universidad del Rosario said in a statement.
Loneliness may be linked to memory performance in older adults, a new study suggests. (iStock)
“It suggests that loneliness may play a more prominent role in the initial state of memory than in its progressive decline,” Venegas-Sanabria said, adding that the findings highlight the importance of addressing loneliness as a factor in cognitive performance.
The findings add to debate about whether loneliness contributes to dementia risk. While loneliness and social isolation are often considered risk factors for cognitive decline, research results have been mixed.
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The study looked at data from the long-running Survey of Health, Ageing and Retirement in Europe (SHARE), which tracked 10,217 older adults between 2012 and 2019. Participants were asked to recall words immediately and after a delay to measure memory performance.
Social isolation and loneliness could play a surprising role in cognitive health among seniors. (iStock)
Loneliness was assessed using three questions about how often participants felt isolated, left out or lacking companionship.
About 8% of participants reported high levels of loneliness at the outset. That group tended to be older, more likely to be female and more likely to have conditions such as depression.
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Researchers found that those with higher loneliness had lower scores on both immediate and delayed memory tests at baseline. Still, all groups — regardless of loneliness level — experienced similar declines in memory over time.
The results suggest loneliness may not directly accelerate the progression of memory loss, though it remains linked to poorer cognitive performance overall.
Researchers look at a brain scan at the National Institutes of Health in Bethesda, Maryland. (Saul Loeb/AFP/Getty Images)
Experts warn, however, that the findings should not be interpreted to mean loneliness is harmless.
“The finding that lonely older adults start with worse memory but don’t decline faster is actually the most interesting part of the paper, and I think it’s easy to misread,” said Jordan Weiss, Ph.D., a scientific advisor and aging expert at Assisted Living Magazine and a professor at NYU Grossman School of Medicine.
“It likely means loneliness does its damage earlier in life, well before people show up in a study like this at 65-plus,” Weiss told Fox News Digital.
By older age, long-term social patterns may already be established, making it harder to detect when the effects of loneliness first took hold, an aging expert says. (iStock)
He suggested that by older age, long-term social patterns may already be established, making it harder to detect when the effects of loneliness first took hold.
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“By the time you’re measuring someone in their late 60s, decades of social connection patterns are already baked in,” he said.
Weiss, who was not involved in the research, added that loneliness may coincide with other health conditions, and noted that participants who felt more isolated also had higher rates of depression, high-blood pressure and diabetes. The link, he said, may reflect a cluster of health risks rather than a direct cause.
“While they can go hand-in-hand, it’s not clear that loneliness contributes to dementia,” a psychotherapist says. (iStock)
Amy Morin, a Florida-based psychotherapist and author, said the findings reflect a broader pattern in research on loneliness and brain health, and that the relationship may be more complex than it appears.
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“The evidence shows there’s a link between loneliness and cognitive decline but there’s no direct evidence of a cause and effect relationship,” she said. “So while they can go hand-in-hand, it’s not clear that loneliness contributes to dementia.”
Morin added that loneliness, which can fluctuate, may not be the root of the problem, but rather a symptom of other underlying mental or physical health issues.
Researchers suggested screening for loneliness be incorporated into routine cognitive assessments as one way to support healthy aging. (iStock)
She said staying socially and mentally engaged is crucial for overall brain health.
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“It’s important to be proactive about social activities,” Morin said. “Joining a book club, having coffee with a friend, or attending faith-based services can be a powerful way to maintain connections in older age.”
The researchers also suggested screening for loneliness be incorporated into routine cognitive assessments as one way to support healthy aging.
Fox News Digital reached out to the researchers for comment.
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