13 Effects of Sleep Deprivation on Your Brain and Body

13 Effects of Sleep Deprivation on Your Brain and Body


If you have trouble falling asleep at night or wake up frequently, you likely have sleep deprivation. Learning to overcome the lack of sleep is essential because it has drastic effects on your brain and body. It does much more than make you feel groggy and grumpy.

You should aim for at least seven to nine hours of sleep each night, even on the weekends. If you go for long periods getting less than that, you will experience a lack of sleep and its many effects. It depletes your mental abilities and poses a risk for your physical health, too.

Whether you have a sleep disorder or struggle with racing thoughts at night, anything that prevents you from getting rest is a problem. Your body requires sleep just as much as nutrients and water. It depends on resting time to restore chemical balances and promote healing and immunity.


Thirteen Effects of Sleep Deprivation

Some of the signs of sleep deprivation include excessive sleepiness, frequent yawning, irritability, and daytime fatigue. If you experience any of the symptoms, make a lifestyle change right away to reduce the effects. So what happens when you don’t get enough sleep? Take a look at these adverse consequences of sleep deprivation.

sleep deprivation1. Sleep Deprivation Causes Memory Issues

Chronic insomnia can disrupt your central nervous system’s ability to function correctly. Research shows that a brain event called sharp-wave ripples is responsible for retaining memories.

The sharp wave ripples transfer learning information and memories from the hippocampus to the neocortex. These ripples occur during the deepest levels of sleep, which occur during a full sleep cycle.

2. Sleep Deprivation Can Cause Trouble Concentrating

Sleep is critical for thinking and learning, and with a lack of sleep, you will find it difficult to concentrate. Lack of sleep harms your cognitive processes by impairing attention, alertness, concentration, reasoning, and problem-solving.  These impairments make it harder to focus, learn, and retain information.

3. Sleep Deprivation Can Cause Mood Swings

Sleep deprivation negatively impacts your mental and emotional state. You’ll experience mood swings and feel impatient about everything. Plus, it makes you feel irritable and hinders your ability to cope with difficult emotions and stress.

4. Sleep Deprivation Compromises Your Immune System

Your immune system produces antibodies and cytokines while you sleep. These substances provide protection, fight infection, and combat bacteria and viruses.

Some cytokines also promote sleep health, which further boosts your immune system. Without adequate sleep, though, your body is unable to produce enough cytokines for normal functioning. When you don’t get enough sleep, your body can’t fight off invaders, and it will take you longer to recover from illness.

5. Sleep Deprivation Can Increase Your Blood Pressure

When you sleep, normal blood pressure drops by 10-20%. This drop is called nocturnal dipping, and those that don’t experience it tend to have hypertension. Poor sleep or nighttime disruptions are linked to blood pressure that doesn’t drop at night.

Lack of nocturnal blood pressure has a more severe effect on the heart than hypertension during the day. It can also cause kidney problems and reduced blood flow to your brain.

Additionally, sleep deprivation can cause high blood pressure during the day too. Hypertension due to lack of sleep effects is most likely to affect middle-aged adults. Additionally, it often affects those who work long hours in high-stress jobs.

6. Sleep Deprivation Can Cause an Increased Risk of Diabetes

Research shows that people with no diabetes risk factors went into a pre-diabetic state after only one week of inadequate sleep. The researchers attribute the increased risk of diabetes to an overactive central nervous system. When the system is overactive, it affects the amount of insulin your pancreas produces to regulate glucose levels.

Additionally, when you don’t get enough sleep, your body doesn’t process glucose efficiently either. So, even if your body produces it, you can’t use it properly. The longer you experience a lack of sleep, the more your risk of diabetes increases.

7. Sleep Deprivation Can Lead toWeight Gain

According to research, people that sleep less than six hours each day are nearly 30% more likely to become obese. Sleep deprivation can cause weight gain for a few different reasons. First, it affects the levels of hormones leptin and ghrelin that control feelings of hunger and fullness.

Leptin signals your brain when you’ve eaten enough, but when you haven’t had enough sleep, your leptin levels decrease. Your brain doesn’t receive the signal, and you continue eating even after you should have stopped. Lack of sleep raises ghrelin levels, stimulating your appetite and leading to unnecessary snacking.


Another reason lack of sleep causes weight gain is because it makes you too tired to exercise. You won’t have the energy to be active and burn calories or build muscle mass.

sleep deprivation8. Sleep Deprivation Increases Your Risk for Developing Cardiovascular Diseases

Sleep is essential for keeping your heart and blood vessels healthy. It affects your blood sugar, blood pressure, and inflammation levels. Getting enough sleep is also vital for healing and repairing blood vessels and the heart.

Studies show a link between insomnia and heart attack or stroke. It shows that people who don’t get enough sleep are more likely to develop cardiovascular disease. Lack of sleep increases your risk of the following issues:

  • heart attack
  • irregular heartbeat
  • heart disease
  • stroke
  • heart failure

9. Sleep Deprivation Lowers Your Libido

People with a lack of sleep experience lower libidos and less interest in sex. This issue stems from depleted energy and increased tension, and it is accurate for men and women.

Men with sleep apnea have another reason for a lowered libido due to sleep deprivation, though. Studies show that they also have low testosterone levels, which affects their sex drive.

10. Sleep Deprivation Affects Your Gait and balance

Research indicates that people with sleep disturbances experience worse balance and gait function. One study of 20 people with no previous history of sleep issues or balance impairments showed that lack of sleep affects balance and posture control.

The participants with deteriorating sleep quantity and quality experienced gait and balance changes. The people that didn’t experience sleep interruptions or deprivation experienced no changes.

11. Sleep Deprivation Makes You Prone to Accidents

Sleep deprivation is dangerous because it can play a role in major accidents. When you’re in a vehicle, it poses a threat to you and the public.

Research shows that driving on a lack of sleep is comparable to driving drunk as it slows your reaction time. It is the cause of about 100,000 vehicle crashes and 1,550 crash-related deaths each year.

Driving isn’t the only time a lack of sleep can lead to accidents, though. You can experience an increase in accidents and injuries on the job when you haven’t had enough sleep, too.

Additionally, the signals your body sends to your brain will likely be delayed when you’re exhausted. When this happens, it decreases your coordination and increases your risk of having an accident.

12. Sleep Deprivation Increases Your Risk for Depression

Lack of sleep can contribute to depression. Studies show that people with depression tend to get less than six hours of sleep each night. Sleep deprivation makes you five times more likely to develop depression, and if you already have it, the symptoms will worsen.

Not getting enough sleep and depression create an endless cycle as they feed on one another. Lack of sleep aggravates depression symptoms, and depression results in less sleep. You might have to treat both issues to find an effective remedy.

13. Sleep Deprivation Can Increase the Aging Process

When you don’t get enough sleep, you’ll experience unhealthy skin coloring and puffy eyes. Additionally, it causes dry skin, fine lines, and dark circles under your eyes. These appearance changes can make you look older and increase the aging process as your body can’t heal itself due to lack of sleep.

Without enough sleep, your body releases excess cortisol, a stress hormone. Increased cortisol levels break down the skin collagen, otherwise known as the protein that keeps skin smooth and flexible.

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