Over the past years, many studies have been conducted to find out how sleep deprivation affects the human health. But, most of us already know that lack of sleep may cause heart disease, diabetes, obesity, as well as malfunctioning of the brain.

sleep deprivation

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It’s obvious that a good night’s sleep is critical for the functioning and recovery of the human body. If we’re unable to renew cells, then we are at risk of developing some degenerative diseases.

Here we show you the negative effects sleep deprivation has on the human body.

Negative Effects Of Sleep Deprivation
Serious Health Problems

Lack of sleep increases the risk of developing various diseases. Less than 6 hours of sleep significantly increase the chances of developing diabetes, heart disease, irregular heartbeat, heart attack, or stroke.


Sleep deprivation can increase the blood pressure levels. With time, this can damage the heart muscle, arteries, kidneys, and vision.

Weakened Immune System

People who sleep less than 6 hours per day have a weaker immune system, which means that the body is unable to produce adequate antibodies.


Lack of sleep increases the secretion of the stress hormone cortisol.

Increased Mortality

According to Harvard Medical School studies, the risk of death increases in people who sleep less than 5 hours per day. That is, the likelihood to die from any health related cause increases by as much as 15 percent.

Negative Impact On Creativity

While we sleep, the brain spontaneously reorganizes information. Thus, it’s no wonder that it’s difficult for people who are sleep deprived to concentrate and to come up with new ideas. They just need to sleep!


Studies show that lack of sleep increases negative emotions. Exhaustion has a big negative impact on mood, making us grumpy and irritable.

Poor Decisions

Many parts of the brain play a role in the decision making process, helping us to make the right decisions. Lack of sleep disturbs the balance and impairs the ability to think right.

Negative Impact On Libido And Fertility

Sleep or sex? When you’re really exhausted, it’s difficult to choose, right? Sleep-deprived men and women simply lose interest in sex and just want to sleep. In addition, sleep deprivation negatively affects the reproductive hormones and reduces the chances of conception.


Lack of sleep accelerates the accumulation of pounds. This problem is mainly caused by the disturbance in the secretion of ghrelin, a hormone that regulates the appetite, and leptin, a hunger-suppressing hormone. This disturbance can lead to chronic overeating.

Studies show that when people are very tired, they are more likely to reach out for food.

In addition, lack of sleep affects the activation of the genes responsible for storing fat in the body, increasing the risk of obesity.


People who suffer from insomnia are much more likely to be depressed.

Increased Risk Of Accidents

Some big recent tragedies are a factor of sleep deprivation, such as the massive oil spill in Exxon Valdez, Chernobyl’s nuclear meltdown, the Three Mile Island nuclear accident, etc.

Also, people who suffer from insomnia are more likely to cause a car accident. As a matter of fact, the percentage is as high as in drunk people.

Slow Reactions

If you did not provide enough time for your brain to rest, it won’t process information as quickly as you need to. Even though you’ll be still able to function and to answer questions, you’ll need much more time.

Premature Aging

Puffy eyes and prematurely aged skin are a common side effect of sleep deprivation. Namely, the increased secretion of cortisol causes decomposition of collagen, the protein that gives the skin its softness and elasticity. This will lead to the formation of fine lines, wrinkles, dark circles under the eyes, and rigid skin.

Dry Skin

Sleep promotes skin hydration, which in turn prevents dry and scaly skin.

Pale Skin Tone

Sleep improves circulation. Thus, lack of sleep can lead to formation of dark circles around the eyes and uneven, gray or pale complexion.

Increased Skin Sensitivity

While we sleep, the immune system gets stronger. On the other hand, lack of sleep can make the our skin more sensitive and worsen certain conditions, such as rosacea and eczema.

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