What are 3 things Lack of sleep can cause?

Getting enough quality sleep is extremely important for health and wellbeing. When we don’t get enough sleep, it can have serious consequences for our physical and mental health. In this article, we will look at three major effects that lack of sleep can cause.

1. Impaired Brain Function

One of the most well-known effects of insufficient sleep is impaired brain function. When we sleep, our brains go through several cycles that are critical for cognitive function. During REM sleep, our brains consolidate memories and learn new information. Without adequate REM sleep, our ability to concentrate, retain information, and make decisions is significantly hindered.

Studies show that chronic lack of sleep can impair attention, alertness, concentration, reasoning, and problem-solving. It can also affect memory, learning new things, and overall cognitive performance. Sleep deprivation has been linked to poor academic and professional performance as well as an increased risk of accidents. Going without sleep for just one night can already have measurable negative effects on brain function.

Examples of Impaired Brain Function

  • Difficulty concentrating and paying attention
  • Impaired learning and memory retention
  • Slower response times and information processing
  • Reduced innovative thinking and problem-solving
  • Poor academic performance in students

2. Weakened Immune System

Lack of sufficient sleep compromises the immune system, making us more susceptible to infections, the common cold, and flu. While we sleep, our bodies produce and release cytokines, antibodies, and other immune cells that target infection and inflammation. Without enough sleep, the immune system does not function at full capacity.

Studies have found that those who sleep fewer than 7 hours per night are nearly three times more likely to develop a cold compared to those who sleep 8 hours or more. Ongoing sleep deficiency can significantly raise the risk of cardiovascular disease, diabetes, cancer, obesity, and other chronic illnesses – partly due to the body’s impaired immune defenses.

Examples of Immune System Effects

  • Increased susceptibility to the common cold and flu
  • Prolonged illness duration
  • Higher levels of inflammation
  • Higher risk of chronic diseases like heart disease and diabetes
  • More frequent infections

3. Mood Disorders and Mental Health Issues

Lack of sleep is linked to a myriad of mental health issues including depression, anxiety, bipolar disorder, and increased stress. Sleep allows the brain to process emotions and experiences. Without enough sleep, our ability to regulate emotions is disturbed. Ongoing sleep deprivation increases the risk of mood disorders and exacerbates existing mental health conditions.

Studies have found that insomnia often precedes depression, anxiety, and suicide. Getting too little sleep increases impulsiveness and reactivity in the face of negative events. It also impairs the prefrontal cortex which is involved in modulating emotions and behavior.

Examples of Mental Health Effects

  • Depression
  • Increased stress
  • Irritability
  • Anxiety disorders
  • Bipolar episodes
  • Increased suicide risk

In summary, lack of sufficient high-quality sleep can impair brain function, weaken the immune system, and cause mood disorders and mental health issues. Prioritizing sleep should be considered as important for overall health as proper diet and exercise.

Tips for Getting Enough Sleep

Here are some tips that can help ensure you get adequate sleep each night:

  • Aim for 7-9 hours of sleep per night
  • Follow a consistent sleep schedule, even on weekends
  • Avoid stimulants like caffeine late in the day
  • Create a relaxing pre-bedtime routine
  • Make sure your bedroom is cool, dark, and quiet
  • Limit exposure to electronic devices before bedtime
  • Reduce alcohol intake which can disrupt sleep
  • Exercise regularly, but not too close to bedtime
  • See a doctor if you suspect a sleep disorder

Prioritizing sleep and having good sleep hygiene can go a long way in helping you get the rest you need to stay healthy, energized and mentally sharp.

The Effects of Sleep Deprivation on Health and Wellbeing

Not getting enough sleep has detrimental effects on nearly every aspect of health and wellbeing. Here is an overview of some of the key adverse impacts of insufficient sleep:

Physical Health Effects

  • Weakened immune system
  • Increased risk of chronic diseases like heart disease, diabetes, cancer
  • Higher levels of inflammation
  • Slower metabolism and weight gain
  • Impaired physical performance and motor skills
  • Slower reaction times
  • Increased errors and accidents
  • Higher pain sensitivity

Mental Health Effects

  • Depression and anxiety
  • Increased stress
  • Irritability and moodiness
  • Impulsiveness
  • Reduced creativity and problem-solving
  • Lack of motivation
  • Lower work performance
  • Impaired memory and concentration

Other Effects

  • Increased cravings for unhealthy foods
  • Clouded judgement and impulsivity
  • Trouble controlling emotions
  • Strained relationships
  • Reduced sex drive
  • Premature skin aging

As this overview illustrates, chronic insufficient sleep affects virtually every system and function in the body and mind. Prioritizing getting enough quality sleep is absolutely crucial for health.

Sleep Requirements Across Age Groups

Sleep requirements vary significantly across different age groups. Here is an overview of the recommended amount of sleep for each age bracket:

Age Group Recommended Amount of Sleep
Newborns 16-18 hours
Infants 14-15 hours
Toddlers 12-14 hours
Preschoolers 11-13 hours
School-age children 9-11 hours
Teens 8-10 hours
Adults 7-9 hours
Older Adults 7-8 hours

As you can see, infants and children need substantially more sleep than adults to support growth and development. However, sleep needs do not necessarily decline with age. Teens still require 8-10 hours per night.

While adult sleep needs are lower, getting 7-9 hours remains essential for physical repair, memory consolidation, and cognitive function. Older adults still need a similar amount of sleep, though they tend to sleep less deeply and wake more frequently.

Signs That You Are Not Getting Enough Sleep

Here are some common signs and symptoms indicating that you are not getting adequate sleep:

  • Consistent fatigue and low energy
  • Having a hard time waking up in the morning
  • Falling asleep during the day
  • Feeling irritable or moody
  • Difficulty concentrating or remembering things
  • Increased illness or colds
  • Clumsiness or impaired motor skills
  • Constant cravings for sweets or caffeine
  • Depression or anxiety
  • Impatience or restlessness

If you regularly experience any of these symptoms, it is likely a sign that you are not getting adequate sleep. Try aiming for the recommended 7-9 hours per night for adults and evaluate whether these symptoms improve.

Health Consequences of Chronic Sleep Deprivation

While occasional sleeplessness is normal, chronic deprivation of sufficient sleep has substantial long-term health consequences including:

  • Obesity: Insufficient sleep alters hunger hormones leading to increased appetite and cravings for calorie-dense foods. This significantly raises obesity risk over time.
  • Diabetes: Lack of sleep impairs sugar metabolism and reduces insulin sensitivity, increasing the likelihood of developing Type 2 diabetes.
  • Heart disease: Ongoing lack of sleep raises blood pressure and inflames arteries and blood vessels, increasing risk of heart attack and stroke.
  • Impaired immunity: inadequate sleep compromises immune function and weakens the body’s defenses against viruses, infections, and disease.
  • Mood disorders: Chronic sleep loss is strongly linked to higher risk of depression, anxiety, and other mental health issues.
  • Cognitive decline: Poor sleep quality impairs cognition and memory over time and can accelerate dementia.
  • Premature death: Studies link chronic sleep deprivation to significantly higher risk of early mortality.

Prioritizing healthy sleep duration and consistency is essential for supporting nearly every aspect of physical health and mental well-being.

Tips for Coping with Sleep Deprivation

When you are getting insufficient sleep, here are some strategies to help get you through the day:

  • Take brief power naps (under 30 minutes)
  • Go outside and get exposure to sunlight
  • Exercise to boost energy levels
  • Avoid heavy foods which can make you sleepy
  • Drink water and stay hydrated
  • Consume caffeine in moderation
  • Listen to upbeat music
  • Practice relaxation techniques like deep breathing
  • Connect socially to boost your mood
  • Keep rooms cool and brightly lit

However, these are just temporary measures. The only way to consistently cope with sleep deprivation is to identify the underlying causes and make changes to improve sleep quality and duration. This may involve adjusting sleep hygiene habits, managing stress, getting screened for sleep disorders, or consulting with a sleep specialist. Making sleep a top priority is essential.

Sleep Deprivation by the Numbers

Here are some statistics that illustrate the prevalence of insufficient sleep across demographics in the US:

  • 35.2% of adults report getting less than 7 hours of sleep per night
  • 48.3% of adults say they snore regularly
  • An estimated 50-70 million US adults have a sleep disorder
  • Prescription sleeping pill use doubled from 2000 to 2014
  • Sleep deprivation costs the US economy over $400 billion annually in lost productivity
  • Drowsy driving causes 1,550 fatalities and 40,000 nonfatal injuries annually in the US

As these statistics show, lack of adequate sleep is a huge public health problem. Greater awareness about sleep health and making sleep a priority can help combat the dangerous consequences of sleep deprivation.


Insufficient sleep substantially impacts nearly every aspect of health and wellbeing. Prioritizing getting enough quality sleep is as important as diet and exercise. Adults should aim for 7-9 hours per night to allow the body to fully rest and repair.

Lack of sleep impairs brain function, weakens immunity, disrupts hormone regulation, and elevates risk of chronic diseases. It also increases risk of mental health issues like depression and raises the likelihood of injuries and accidents.

Warning signs like consistent fatigue, cognitive issues, and constant illness indicate you may not be getting adequate sleep. While coping strategies can help in the short-term, improving sleep duration and consistency is key to protecting long-term health.

Given the clear dangers posed by sleep deprivation, increasing public awareness about sleep health is critical. More education is also needed on proper sleep hygiene habits and identifying signs of sleep disorders. Promoting healthy sleep should be a top public health priority.

Leave a Comment