How Do Psilocybin Mushrooms Affect Your Sleep

Sleep is not a luxury. It is the time when the brain sorts out the day, the body repairs itself, and the mind gets ready for the next morning. Most people only notice how important sleep is when they lose it. One bad night can make a person slow, forgetful and short-tempered. Several bad nights in a row can change how they work, how they study, how they drive, and how they get along with the people around them. That is why any substance that disturbs sleep deserves to be taken seriously, even if the sleep problem does not appear on the same night the substance is used.

Psilocybin mushrooms are a hallucinogenic substance. The active chemical in them, psilocybin, changes how the brain handles signals, and that change can last for hours. People who use them often talk about altered senses and changed thinking during the experience itself. What is talked about less is what happens later, when the experience ends and the person tries to sleep. For some people, sleep that night is light, broken or strange. For others, the trouble lasts longer, and the nights that follow are also disturbed. This article explains, in plain words, how psilocybin mushrooms can affect sleep, why the effect happens, what poor sleep does to the rest of life, and when the pattern becomes a warning sign. It is general information only, not individual medical advice. If sleep problems or substance use are worrying you, a qualified health professional is the right person to talk to.

It is important to be honest about what is known and what is not known. Psilocybin has been studied in small research settings, but much of the evidence about its effects on sleep in everyday use comes from reports by people who have used it, from health guidance on hallucinogens, and from what doctors know about how sleep, mood and brain chemistry work together. There is no simple rule that says every person who uses psilocybin mushrooms will have the same sleep problem. Some people report little change. Others report nights that feel ruined. The difference can depend on the person’s health, their mental state, their sleep habits before use, and how often they use the substance. What is clear is that disturbed sleep is a real and recognised harm, and that it can matter more than people expect, because sleep touches almost everything else.

What Sleep Normally Does for the Brain and Body

A healthy night of sleep is not one long stretch of doing nothing. It is a cycle that repeats several times, moving between lighter sleep, deeper sleep, and dreaming sleep. Deep sleep is the stage when the body does most of its repair work. Muscles recover, the immune system strengthens, and the brain clears away waste that builds up during the day. Dreaming sleep, which doctors call REM sleep, is the stage when the brain processes memories and emotions. It helps a person make sense of what happened during the day and wake up feeling more settled. When these stages are cut short or broken up, the person may sleep for many hours and still wake up feeling unrefreshed, as if the night never really happened.

Sleep also sets the timing of the whole day. The brain has an internal clock that tells it when to feel sleepy at night and alert in the morning. Light, meals, activity and regular bedtimes all help that clock stay steady. When the clock is disturbed, a person can feel wide awake at midnight and exhausted at midday, even if they went to bed at the usual time. That mismatch is one of the most tiring parts of a sleep problem, because the person is fighting their own body clock instead of working with it. Over time, an unsettled clock makes it harder to fall asleep at a normal hour, and harder to stay awake and think clearly during the day.

Thinking depends on sleep more than most people realise. After a good night, attention is steadier, memory works better, and decisions are easier to make. After a poor night, simple tasks take longer. A person may read the same page twice, forget what they went into a room for, or struggle to follow a conversation. They may also find it harder to control their temper, because tiredness lowers patience. None of this means the person is lazy or careless. It means the brain has not had the rest it needs to work properly. When poor sleep repeats night after night, these small problems add up, and they can affect work, study, driving and relationships in ways that are hard to ignore.

How Psilocybin Changes the Brain During the Night

Psilocybin works by changing how brain cells send messages to each other, especially through a chemical messenger called serotonin. Serotonin is involved in mood, perception and sleep. When psilocybin is active, the brain’s usual patterns of activity change. Senses can feel stronger or stranger, thoughts can move in unusual directions, and time can feel slower or faster than normal. That is the experience people describe during the hours when the substance is active. What matters for sleep is that the brain does not simply switch back to normal the moment the experience ends. The chemical changes, the mental stimulation and the emotional intensity can linger, and the brain can stay in a state that is the opposite of sleepy.

Sleep needs the brain to slow down. Heart rate falls, breathing becomes steadier, muscles relax, and thoughts quieten. Psilocybin pushes in the other direction. It can raise alertness, increase mental activity, and make a person more sensitive to sounds, light and thoughts. Even after the strongest effects have faded, a person may still feel wired, restless or mentally busy. Lying in a dark room does not always help, because the mind keeps turning over images, ideas and feelings from the experience. For some people, that mental activity feels interesting at first. Then, as the hours pass and sleep still does not come, it becomes frustrating and exhausting.

Anxiety can add to the problem. A difficult or frightening experience can leave a person feeling uneasy long after it ends. They may worry about what they felt, what they thought, or whether the feelings will come back. That worry itself keeps the brain alert, and an alert brain finds it hard to fall asleep. The person may check the clock again and again, which only increases the worry. They may get up, walk around, look at a phone, and then try again, only to find the same restlessness waiting for them. In this way, one disturbed night can create a fear of the next night, and the fear itself becomes part of the sleep problem.

Why Falling Asleep Can Become Harder

Falling asleep is not something a person can force. It happens when the body is tired, the mind is calm, and the surroundings are quiet and dark. Psilocybin can disturb all three of those conditions. The body may feel tired after a long and intense experience, but the mind may still be active. The person may feel physically worn out and mentally wide awake at the same time, which is a confusing and uncomfortable combination. They lie down expecting sleep to arrive, and instead they find themselves thinking, remembering and watching the ceiling. The longer they lie awake, the more awake they feel.

Timing also matters. If psilocybin is used late in the day or in the evening, its effects can run into the normal bedtime. The person may still be feeling the after-effects when they would usually be falling asleep. Even if the substance was used earlier, the mental and emotional impact can carry into the night. A person who had a confusing or upsetting experience may spend the evening thinking about it, talking about it, or trying to make sense of it. That is a normal human response to a strange experience, but it is also the opposite of the calm winding-down that sleep needs. The brain needs time to settle, and a strong experience does not always allow that time.

Over time, repeated use can make the problem worse in a different way. If a person uses psilocybin often, their sleep pattern may never fully settle between uses. They may start going to bed later, waking up later, and sleeping at irregular times. Irregular sleep weakens the body clock, and a weak body clock makes the next night harder again. The person may then feel tired during the day and try to catch up with long naps, which can make the following night even harder. It becomes a loop: disturbed nights lead to irregular days, and irregular days lead to more disturbed nights. Breaking that loop usually takes more than one good night. It takes a return to regular sleep times, and time for the body clock to steady itself again.

Dreams, Broken Sleep and Waking in the Night

Even when a person does fall asleep after using psilocybin mushrooms, the sleep they get is often not the same as usual. Many people report vivid, strange or unsettling dreams. Dreaming sleep is the stage when the brain processes emotions and memories, and after a powerful experience, there is a great deal for the brain to process. Dreams may feel more intense, more emotional, or harder to shake off in the morning. A person may wake up in the middle of the night feeling confused, anxious or unsure whether they are still dreaming. That kind of waking is frightening, and it can make the person afraid to go back to sleep.

Waking during the night is also common. A person may fall asleep, wake after an hour or two, and then find it hard to fall asleep again. The night becomes broken into pieces, with long stretches of lying awake in between. Broken sleep is often worse than short sleep, because the person never gets a long enough stretch of deep sleep to feel rested. They may remember the night as a series of short sleeps and long waits, and they may wake in the morning feeling as if they had not slept at all. That feeling is not imagined. The body really has missed the deep and dreaming stages it needed, even if the person spent eight hours in bed.

Some people also report that their dreams stay with them during the day. A vivid or frightening dream can affect mood for hours after waking, especially if it felt real. The person may feel uneasy, sad or on edge without fully knowing why. If the dreams repeat over several nights, the person may start to dread going to sleep, because they do not know what the night will bring. That dread is understandable, but it also makes sleep harder, because going to bed while feeling anxious is one of the worst ways to start the night. In this way, disturbed dreams and disturbed sleep can feed each other, night after night.

Deep Sleep and the Feeling of Not Resting

Deep sleep is the part of the night that most people cannot describe, because they are not aware of it while it happens. They only notice it by how they feel in the morning. After a night with enough deep sleep, the body feels lighter, the head feels clearer, and the day feels manageable. After a night without enough deep sleep, the body feels heavy, the head feels foggy, and even small tasks feel like hard work. Psilocybin can reduce the amount of deep sleep a person gets, partly because the brain stays too active to settle into that stage, and partly because the night is broken by waking. The result is a night that looks like sleep from the outside, but does not do the work of sleep on the inside.

This is one of the reasons people can be confused by their own tiredness. They may say, “I slept for eight hours, so why am I still tired?” The answer is that hours in bed are not the same as hours of good sleep. If those hours were light, broken and full of vivid dreams, the brain may have missed the deep stage it needed most. The person may also have missed the dreaming stage that helps with emotional balance. Without those stages, the brain wakes up still carrying the tiredness and the feelings of the day before. It is like charging a phone with a loose cable: the phone was plugged in all night, but the battery never really filled up.

The effect can last beyond a single night. If deep sleep is disturbed for several nights in a row, the tiredness builds up into what doctors call a sleep debt. A sleep debt is not just feeling sleepy. It is a state in which thinking is slower, reactions are delayed, and the body is more likely to get ill. A person with a sleep debt may catch colds more easily, take longer to recover from hard work, and find it harder to concentrate. They may also feel more emotional, because the brain has not had the dreaming sleep it needs to process feelings. Paying back a sleep debt takes more than one long lie-in. It takes several nights of regular, unbroken sleep, and that is hard to achieve if the cause of the disturbance is still present.

The Next Day Pays the Price

The morning after a disturbed night is often the clearest proof of the harm. A person may wake up with a headache, dry eyes, and a feeling of heaviness that coffee does not fix. They may move more slowly, speak more slowly, and need more time to understand what other people are saying. At work or at college, they may make mistakes they would not normally make: forgetting an appointment, missing a detail, or losing track of a task halfway through. They may also feel less patient with colleagues, family or children, and small frustrations that they would normally ignore can feel much bigger. None of this is a character flaw. It is what tiredness does to a normal brain.

Driving is one of the most serious risks of the next day. A tired driver reacts more slowly, misses warning signs, and is more likely to drift or lose focus. The risk is similar to driving after drinking alcohol, although people take it far less seriously. A person who has slept badly may believe they are fine to drive, because they feel awake enough to get into the car. But tiredness can arrive suddenly, especially on a long or boring road, and by the time the driver notices it, it may be too late. This is why health guidance treats poor sleep as a safety issue, not just a comfort issue. The harm of a bad night does not stay in the bedroom. It can travel onto the road, into the workplace, and into any task that needs attention.

School and study suffer in the same way. Learning needs memory, and memory needs sleep. During sleep, the brain moves new information from short-term memory into long-term memory, where it can be used later. When sleep is disturbed, that process is interrupted, and the person may find that they studied hard but remember little the next day. They may also find it harder to learn new things, because a tired brain takes in information more slowly. For a student, this can feel deeply unfair: they put in the hours, but the sleep problem takes away the benefit. For a worker, it can feel the same: they turn up, they try, but the tiredness makes the day feel twice as long and half as productive.

When Sleep Problems Keep Coming Back

One bad night is unpleasant, but it usually passes. The body catches up, the clock steadies, and the next night is better. The problem becomes more serious when disturbed nights keep coming back. If a person uses psilocybin mushrooms repeatedly, and sleep is disturbed after each use, the nights in between may not be enough to recover fully. The person may start to live in a state of constant mild tiredness, where they never feel fully rested, but also never feel ill enough to stop and think about why. They may get used to feeling foggy, slow and irritable, and begin to think that is normal. It is not normal. It is the sign of a sleep pattern that has been damaged over time.

Repeated poor sleep also changes how a person thinks about sleep itself. They may start to worry about bedtime during the day, planning how they will try to sleep, what they will do if they cannot sleep, and how tired they will be tomorrow. That worry is understandable, but it makes sleep harder, because sleep needs relaxation, not planning and pressure. The bedroom can start to feel like a place of frustration rather than rest. The person may lie down already expecting a bad night, and that expectation can become a self-fulfilling pattern. This is one of the ways a short-term sleep problem turns into a longer-term one, even after the original cause has gone.

There is also a risk that a person will try to fix the sleep problem in ways that make it worse. They may use alcohol to try to fall asleep, but alcohol also disturbs deep sleep, so the night is still poor. They may use sleeping pills without medical advice, which can create dependence and new problems. They may drink large amounts of caffeine during the day to stay awake, which then makes the next night harder. Each of these attempts feels like a solution in the moment, but each one adds another problem to the sleep pattern. The honest answer is that there is no quick fix for disturbed sleep. The body needs regular sleep times, a calm evening, and time without the substance that disturbed it in the first place.

Sleep, Mental Health and the Risks That Build Up

Sleep and mental health are closely connected, and they affect each other in both directions. Poor sleep can make anxiety and low mood worse, and anxiety and low mood can make sleep worse. A person who sleeps badly for several nights may start to feel more worried, more sad, or more easily upset. They may lose interest in things they used to enjoy, because they are too tired to enjoy them. They may also find it harder to cope with stress, because a tired brain has fewer resources to deal with problems. Over weeks, this can look like a mood problem, when part of the cause is really a sleep problem that has not been fixed.

Psilocybin can add to this in a particular way, because it can bring up strong emotions during the experience itself. A person may feel fear, sadness or confusion that stays with them after the experience ends. If they then sleep badly, they have less chance to process those feelings properly, because dreaming sleep is the stage when the brain does much of that processing. The feelings can therefore stay raw and unsettled for longer. The person may wake up still thinking about what they felt, and go through the day carrying that weight. If this happens repeatedly, it can leave the person feeling emotionally worn out, even if they cannot explain exactly why.

The longer-term risks are the ones that worry health professionals most. Chronic poor sleep is linked with a higher risk of high blood pressure, heart problems, diabetes, and a weaker immune system. It is also linked with a higher risk of depression and anxiety over time. None of these risks appears after one bad night. They build up slowly, over months and years of disturbed sleep, which is why they are easy to miss. A person may not connect a heart problem or a long period of low mood with sleep that was disturbed years earlier. But the connection is real, and it is one of the reasons doctors take sleep seriously. Protecting sleep is not about comfort. It is about protecting the brain and the body for the years ahead.

My Take:

I will be honest with you. I think sleep is the most undervalued part of health, and this topic proves it. People worry about food, exercise and medicine, but they treat sleep as something they can cut short whenever life gets busy. Then a substance disturbs their sleep, and they are surprised by how much of their life falls apart. It should not be a surprise. Sleep is the foundation. When the foundation cracks, everything built on it starts to lean. Work leans. Study leans. Mood leans. Relationships lean. I wish more people understood that before they risked their sleep, not after.

What stays with me most is how quiet the damage is. A bad night does not look dramatic. There is no wound to see, no fever to measure. There is just a person who wakes up a little slower, a little foggier, a little less patient than yesterday. Then it happens again, and again, until the slower, foggier version feels like the real person. That is what frightens me. The person does not notice the change happening, because it happens in such small steps. By the time they do notice, they have already lost weeks of good days to tiredness they could have avoided. I think that quiet, gradual loss is the most dangerous kind of harm, because it does not shout for attention.

I also think about the next day more than the night itself. A disturbed night is bad, but the next day is where the harm becomes visible. The mistake at work. The forgotten appointment. The sharp word to a child who did nothing wrong. The long drive home when the eyes keep closing. Those are the moments that stay in a person’s memory, and they are also the moments that can cause real damage. I would rather people thought about the next day before they used something that could ruin their night, because the night is private, but the next day is shared with everyone around them. Their tiredness does not only affect them. It affects their family, their colleagues, and anyone who depends on them being alert.

The dream problem is one I take seriously, because dreams feel so personal. A frightening or confusing dream can stay with a person for hours, sometimes for days. It can make them afraid of the night, and that fear makes the next night worse. I understand that fear. Nobody wants to close their eyes not knowing what the night will bring. Sleep should feel safe. When it stops feeling safe, something important has been lost. I do not think people should accept that loss as normal. If sleep has stopped feeling safe, that is a clear sign that something needs to change, and the change should not wait.

I want to say something plainly about fixing sleep, because I hear a lot of bad advice about it. Alcohol does not fix sleep. It may make a person fall asleep faster, but it breaks up the deep sleep that matters most, so the person wakes up still tired. Large amounts of caffeine do not fix sleep either. They borrow alertness from tomorrow and charge interest on it. Sleeping pills bought without advice do not fix sleep. They can create a new problem on top of the old one. The real fix is slower and less exciting: regular bedtimes, a calm evening, a dark and quiet room, and time away from the substance that disturbed sleep in the first place. I know that sounds simple, and I know simple answers can feel disappointing. But sleep is a simple system, and it responds to simple, steady habits far better than it responds to quick fixes.

If you are a parent, I would ask you to think about this from your children’s point of view. A tired parent is a less patient parent. They shout more easily, they listen less carefully, and they have less energy to play, to help with homework, or to simply be present. Children notice that, even if they cannot explain it. They may not know why their parent is tired, but they feel the difference. I am not saying this to make anyone feel guilty. I am saying it because children are often the quietest victims of a sleep problem, and they deserve a parent who is rested enough to be kind. If sleep is suffering, the family is suffering too, even if nobody says it out loud.

I also think about young people, because they are often the ones who hear that psilocybin mushrooms are harmless or even helpful. I understand why that message is attractive. It promises insight, calm or a new way of seeing the world, without the obvious dangers of other substances. But a message that ignores sleep is an incomplete message. If a substance can disturb your sleep for nights afterwards, and poor sleep can damage your thinking, your mood and your health, then the substance is not harmless. It may not cause the kind of harm that sends a person to hospital, but it can cause the kind of harm that slowly takes away their good days. I think young people deserve the full picture, not just the attractive half of it.

I will not pretend that stopping is easy, especially if a person has come to rely on a substance for relaxation, insight or escape. But I will say this: sleep is worth protecting, and it is worth protecting early. The sooner a person gives their sleep a chance to recover, the sooner their body clock steadies, their thinking clears, and their mood lifts. The recovery is not instant. The first few nights may still be restless. But each regular night helps, and after a week or two of steady sleep, most people notice a real difference. They wake up clearer. They feel less irritable. They get through the day without needing to fight their own tiredness. That difference is the reward for giving sleep the respect it deserves.

Finally, I would say this to anyone who is reading this because their sleep has already been disturbed. Do not wait for the problem to fix itself, and do not try to fix it alone if it keeps coming back. Talk to a health professional. Tell them honestly what you have used, how your sleep has changed, and how you feel during the day. They have heard this before, and they are there to help, not to judge. A sleep problem is a health problem, and it deserves the same honest attention as any other health problem. You do not need to be ashamed of it. You need to be honest about it, because honesty is the first step towards sleeping well again, and sleeping well is the first step towards feeling like yourself again.

There is another point I keep returning to, and it is about how tiredness changes the way a person judges risk. A well-rested person can look at a situation and see the danger in it. A tired person often cannot. They take the shortcut, they skip the check, they say yes when they should say no, simply because their brain is too tired to do the careful work of thinking. I have seen this in ordinary life again and again: the tired driver who decides he is fine, the tired worker who skips a safety step, the tired student who copies an answer instead of learning it. None of those people are bad people. They are tired people, and tired people make worse decisions. When a substance disturbs sleep night after night, it does not only make a person sleepy. It makes them less safe, less careful, and less able to protect themselves and others. That is a cost I do not think is talked about enough.

I also think about the way poor sleep steals ordinary pleasure. A good day is not made of grand events. It is made of small things: a morning cup of tea that tastes right, a conversation that flows easily, a walk that feels refreshing, a piece of work finished well. Tiredness dulls all of those things. Food tastes blander, jokes feel less funny, music sounds flatter, and even rest feels restless. The person is still living their life, but they are living it through a fog, and the fog takes the colour out of everything. I think that is a sad loss, because those small pleasures are what make a normal life worth living. When sleep is protected, those pleasures come back. Food tastes better, people are easier to be with, and the day feels like it belongs to the person living it, rather than something they have to endure until bedtime.

Money is another part of the story that I do not want to ignore. Poor sleep costs money in ways people do not count. A tired worker is less productive, and less productivity can mean lost hours, lost work, or lost chances at a better job. A tired person may spend money on caffeine, energy drinks and late-night food to get through the day, and that spending adds up. They may miss work altogether on the worst days, and missed work means lost pay. None of these costs appears on a single receipt, so they are easy to miss. But over a month or a year, they can add up to a serious amount. I think it is worth counting them honestly, because when a person sees what poor sleep is really costing them, the idea of protecting sleep stops sounding like a luxury and starts sounding like common sense.

What worries me most of all is the person who has stopped noticing how tired they are. At first, the tiredness is obvious. Then it becomes familiar. Then it becomes the background of life, something the person no longer questions. They say, “I am just a person who does not sleep well,” as if that were a fixed part of who they are. It is not fixed. It is a pattern, and patterns can change, but only if the person recognises the pattern first. I would ask anyone reading this to do a simple check: compare how you feel now with how you felt before your sleep changed. If you were clearer, calmer and more patient before, then the tiredness is not who you are. It is what has happened to you, and it can be changed. That comparison is a powerful tool, because it reminds the person that a better version of their daily life is not a fantasy. It is a memory, and it can be recovered.

One more thing I want to add is about asking for help early, because I think people wait too long. They tell themselves the sleep problem will pass, that they just need a better mattress, or a quieter room, or a holiday. Those things can help, but they do not fix a sleep pattern that has been disturbed again and again. Waiting does not make the problem smaller. It makes the tiredness feel normal, and normal tiredness is the hardest kind to notice. If sleep has been poor for weeks, that is already long enough to ask for advice. A health professional can listen without judgement, help work out what is causing the problem, and suggest a plan that fits the person’s life. That conversation costs nothing but honesty, and it can save months of tired days.

I want to end this part with a note of hope, because I do not believe a sleep problem is a life sentence. The brain is remarkably good at recovering when it is given regular sleep, a calm evening, and time. The first nights may still be difficult, and I will not pretend otherwise. But the body clock is a strong system, and it wants to return to a steady rhythm. Each night of regular sleep is a step back towards that rhythm, and each step makes the next night a little easier. The person who gives sleep a real chance, night after night, is not wasting time. They are rebuilding the foundation of their health, their thinking and their mood, one night at a time. That is slow work, and it is not glamorous work, but it is the work that makes every other part of life possible again.

Frequently Asked Questions

Does stopping Psilocybin Mushrooms improve sleep?

Stopping can help sleep improve, but the improvement is usually gradual rather than instant. In the first few nights after stopping, sleep may still be restless while the brain and body clock settle back into a normal pattern. Over one to two weeks of regular bedtimes, a calm evening routine and no further use, many people find that they fall asleep more easily, wake less often during the night, and feel more rested in the morning. If sleep problems continue for several weeks after stopping, it is worth talking to a health professional, because there may be another cause that needs attention.

Can Psilocybin Mushrooms cause insomnia?

Yes, psilocybin mushrooms can contribute to insomnia, which means difficulty falling asleep, staying asleep, or getting restful sleep. The substance can keep the brain active and alert at a time when it needs to slow down, and a difficult or intense experience can leave a person feeling anxious or restless at bedtime. Vivid dreams and waking during the night can also break up sleep. Not everyone who uses psilocybin will develop insomnia, but disturbed sleep is a recognised harm, and repeated use makes the problem more likely.

Does Psilocybin Mushrooms affect deep sleep?

Yes, psilocybin mushrooms can affect deep sleep. Deep sleep is the stage when the body repairs itself and the brain clears away waste from the day, and it needs the brain to settle into a slow, steady rhythm. Because psilocybin can keep the brain active, raise alertness and break up the night with waking, a person may spend less time in deep sleep even if they spend many hours in bed. That is why they can wake up feeling tired and unrefreshed, as if the night never really gave them proper rest.

How long does Psilocybin Mushrooms disturb sleep?

For many people, the worst disturbance is on the night of use and the night after, when the brain is still settling down from the experience. If use was a single occasion, sleep often returns to normal within a few nights, especially with regular bedtimes and a calm evening routine. With repeated use, the disturbance can last longer, because the body clock may become irregular and the sleep pattern may not fully recover between uses. If sleep remains disturbed for more than a few weeks, a health professional should be asked for advice.

Why does Psilocybin Mushrooms keep you awake at night?

Psilocybin mushrooms can keep a person awake because the substance changes brain activity and keeps the mind alert, busy and sensitive to thoughts, sounds and feelings at a time when sleep needs quiet and calm. The experience itself can be mentally and emotionally intense, and that intensity can linger after the strongest effects have faded. Worry about a difficult experience, vivid dreams, and waking during the night can also keep the person awake. In short, the brain is pushed towards alertness when it needs to move towards rest.

Can poor sleep from Psilocybin Mushrooms harm health?

Yes, poor sleep can harm health, especially when it continues over time. Short-term poor sleep can slow thinking, weaken memory, lower patience and increase the risk of accidents, particularly when driving or working with machinery. Long-term poor sleep is linked with a higher risk of low mood, anxiety, high blood pressure, heart problems and a weaker immune system. The harm does not come from one bad night alone, but from a pattern of disturbed nights that prevents the brain and body from recovering properly.