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Does Going 48 Hours Without Sleep Affect Your Health?

Published: Nov 05, 2023
Updated: Jan 17, 2025
Does Going 48 Hours Without Sleep Affect Your Health?
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    When you try to rush to meet a work deadline or cram for an exam, you’ll probably stay up all night for it without thinking much of the consequences. But did you know that when you do this, you face the risk of sleep deprivation? Going 48 hours, no sleep and longer can lead to negative health consequences.

    In this article, we’ll discover the different effects of not sleeping for more than a day and strategies to recover from lack of sleep.

    Key Takeaways
    Going 48 hours with no sleep can lead to a condition called sleep deprivation and can cause severe cognitive impairment.
    Consistently not getting enough sleep can lead to chronic sleep deprivation, leading to long-term consequences such as increased risk of accidents, difficulty with concentration and memory-related issues.
    There are a few stages of sleep deprivation where you’ll start to experience symptoms affecting your physical health and mental health.
    Recovering from sleep deprivation can take a longer time than expected, especially if you’ve not been getting enough sleep for an extended period of time.
    You can implement good sleep hygiene practices as a strategy to prevent and recover from sleep deprivation.

    Is It Okay To Go 48 Hours, No Sleep?

    woman sitting in front of laptop and yawning, going without sleep for more than 48 hours

    The short answer is— no, it is not okay. Going without sleep for extended periods will lead you to experience a condition called sleep deprivation. It is detrimental to both your body and mind as it can cause cognitive impairment. You may also experience brief episodes of unconsciousness, known as microsleep [1].

    What is Sleep Deprivation?

    common symptoms of sleep deprivation include excessive daytime sleepiness, memory problems, slower thinking, irritability and difficulty concentrating shuteye

    It is recommended for normal, healthy adults to get between seven to nine hours of sleep each night. However, this number may change depending on individual sleep needs.

    Not getting enough sleep can lead to sleep loss, also known as sleep deprivation [2]. Being sleep-deprived can lead to several health conditions or issues, including:

    • Anxiety
    • Memory impairment
    • Mood swings
    • Diabetes
    • Depression
    • High blood pressure (Hypertension)
    • Heart disease
    • Excessive daytime sleepiness
    • Difficulty concentrating
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    Stages of Sleep Deprivation

    1. First 24 hours without sleep

    The first stage of sleep deprivation kicks in after 24 hours of no sleep. This is when you’ll start to feel tired or drained. Your alertness and attention span will start to decrease, making you more prone to committing mistakes in simple, everyday tasks.

    Additionally, studies also discovered similarities between cognitive and physiological impairment due to fatigue and impairment due to alcohol consumption. It is suggested that going 24 hours without sleep is similar to having a blood alcohol content level of 0.10%, past the legal limit in the United States [3].

    Your stress hormones will also likely increase during this stage to cope with the fatigue and help you to continue functioning.

    2. After 36 hours

    After 36 hours of not sleeping, the effects will start to increase in severity. These extended hours without sleep come with alarming effects on both your physical health and mental health. You may experience physical symptoms such as a strong urge to sleep, extreme fatigue, and hunger. You may also experience hallucinations and microsleep episodes.

    3. After 48 hours

    Past 48 hours without sleep, it becomes known as extreme sleep deprivation. It will be hard for you to even keep your eyes open and at the same time, you may experience other effects like:

    • Depersonalization
    • Anxiety
    • Extreme mood swings

    Your risk for diabetes and chronic diseases will also increase at this point.

    4. After 72 hours

    After reaching the 72-hour mark, the desire to sleep is almost unbearable. Microsleeps are longer and more frequent. Your perception of the world around you starts to warp. Your emotions might be all over the place. You could feel irritable, anxious, or even depressed.

    Worst of all, you may see complex hallucinations, have delusions, or experience disordered thinking.

    At this point, recovering from sleep deprivation will be a long process. Even if you prioritize sleeping about 7 to 8 hours per night, you may wake up groggy the next day. It might take weeks for your body to recover.

    5. Being awake for 96 hours or more

    If you push through to 96 hours or more without sleep, you’ve officially reached dangerous territory. Your perception of reality can become severely warped, and the need for sleep will become nearly overpowering.

    In some cases, you might even experience sleep deprivation psychosis, making it hard to tell what’s real. Not only that, but chronic poor sleep can lead to an increased risk for serious health issues like hypertension, heart attack, stroke, diabetes, dementia, and even certain cancers [4].

    The good news is that these effects are reversible provided that you prioritize getting enough restful sleep. However, it may take a while to recover from long-term sleep deprivation. So, before you decide to sacrifice sleep in favor of work, think twice about the potential consequences.

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    How Long Does It Take To Recover From Sleep Deprivation?

    The time that it takes to recover from sleep deprivation really depends on how long you have stayed awake. For example, getting 30% less sleep than your body needs for a few days may require more than a week’s worth of proper sleep to recover [5].

    Research suggests that even if it is acute sleep deprivation, it may take a longer time than expected to fully recover [6].

    Strategies to Recover from Sleep Deprivation

    strategies to recover from sleep deprivation shuteye

    Sleep deprivation impairs the accurate recognition of human emotions and leads to numerous other issues that can lower your quality of life. A simple yet effective way to recover is to ensure you get enough quality sleep.

    Here are some strategies that can help you bounce back, fall asleep faster, and improve sleep quality:

    1. Maintain a consistent sleep schedule: Try to hit the sack and wake up at the same time daily. Yes, even on weekends! Doing this will help regulate your internal clock, making it easier for you to fall asleep and wake up.
    2. Create a sleep-friendly environment: Your bedroom should be cool, dark, and quiet. If outside noises are a distraction, use earplugs or a white noise machine.
    3. Make your bed as comfortable as possible: Adjust your pillows and blankets to meet your comfort needs. This relaxation act can make you drift off to sleep faster.
    4. Follow a relaxing bedtime routine: Why not take a warm bath, stretch out those tired muscles, or meditate? You can even lose yourself in a good book. These calming activities are your body’s cue to wind down and get ready for sleep.

    If not being able to sleep starts to affect your quality of life, you may want to consider consulting with a doctor for medical advice and proper diagnosis. Seeking professional help can help you to rule out or identify if your sleep deprivation is caused by underlying sleep disorders such as obstructive sleep apnea, insomnia, restless leg syndrome (RLS), or others.

    Conclusion

    Going without sleep for 48 hours can have severe effects on both your physical and mental well-being. From impaired cognitive performance to extreme fatigue and disordered thinking, sleep deprivation can have severe consequences. Preventing sleep deprivation requires you to practice good sleep habits.

    One way to help you keep track of your sleep habits is by using the ShutEye® app. ShutEye monitors your sleep patterns and provides you with a detailed report of how your night went. Based on this, you’ll receive personalized recommendations to help you improve your habits for a good night’s rest. Try it for free, limited time only!

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    FAQ

    Yes, you can survive 48 hours without sleep. However, you may experience significant impairments in terms of cognitive function, extreme fatigue, weakened immune system, and more. It can also increase your risk of accidents, and long-term health issues.

    If you've not slept in 48 hours, you must take steps to help you recover and get to bed as soon as possible. This can be done by practicing good sleep hygiene. Start by creating a restful sleep environment, avoiding caffeine, and practicing relaxation techniques to help you ease into it.

    You may want to consider seeking medical attention if you are experiencing symptoms that affect your quality of life such as severe cognitive impairment, hallucinations, or risk of harming yourself.
    About authors
    Jessica Brown, a 29-year-old freelance copywriter passionate about human nature and deeply committed to promoting sleep and mental health awareness. Jessica holds a Master of Arts in Literary Studies from the National University of Singapore and a Bachelor's in Biology from the University of Cambridge.
    Siti Amirah
    Reviewer
    Amirah is a content writer passionate about topics related to mental health and wellness. Recently, she delved into the realm of sleep health, spurred by a personal recognition of her subpar sleep habits and a desire for improvement. Amirah holds a Bachelor’s Degree in International Communication Studies from the University of Nottingham.

    Biggers, A. (2019) The effects of going more than 24 hours without sleep [online]. Available at: https://www.medicalnewstoday.com/articles/324799

    Centre for Disease Prevention (2020) NIOSH Training for Nurses on Shift Work and Long Work Hours [online]. Available at: https://www.cdc.gov/niosh/work-hour-training-for-nurses/longhours/mod3/08.html

    John Hopkins Medicine (2025) Health Risks of Poor Sleep [online]. Available at: https://www.hopkinsmedicine.org/health/wellness-and-prevention/health-risks-of-poor-sleep

    John Hopkins Medicine (2025) Sleep Deprivation [online]. Available at: https://www.hopkinsmedicine.org/health/conditions-and-diseases/sleep-deprivation

    Kiefer, D. (2021) Recovering from sleep deprivation takes longer than expected [online]. Available at: https://www.medicalnewstoday.com/articles/recovering-from-sleep-deprivation-takes-longer-than-expected

    LaMotte, S. (2021) Recovering from a lack of sleep takes longer than you might think, study says [online]. Available at: https://edition.cnn.com/2021/09/09/health/sleep-deficit-recovery-wellness/index.html

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