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Home > Sleep Disorders > 9 Harmful Health Effects of Not Getting Enough Sleep

9 Harmful Health Effects of Not Getting Enough Sleep

March 2, 2022 - Updated on June 15, 2022
8 min read
By Ahmad Abazid, MD, FAAFP | Family Physician

In this article:

  • What Are the Dangerous Side Effects of Not Getting Enough Sleep?
  • How Many Hours Should an Adult Sleep During the Night?
  • What Medical Conditions Can Cause Insomnia?
  • How Is Insomnia Treated?
  • How Is Insomnia Diagnosed?
  • Final Word

Your brain needs you to sleep so it can rest, reset, and restart correctly. Thus, getting restful sleep is an important requisite for the maintenance of your physical, emotional, and mental well-being.

harmful side effects of inadequate sleep

In fact, it is as important as food and water in that regard. Not getting enough sleep can adversely affect your brain, your heart, and immune system. (1)(2)

People who struggle to get adequate or good-quality sleep on a regular basis tend to become drowsy and tired during the daytime, which compromises their ability to think clearly, focus on tasks, and function at their best.

If you cannot focus well, you cannot think clearly, so your decisions can be impaired. You may even be at risk of meeting a car or work accident.

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Plus, sleep deprivation makes your body crave sugars and carbs, which leads to obesity and diabetes. You can also get seizures if you have not slept in a long time. (3)

What Are the Dangerous Side Effects of Not Getting Enough Sleep?

side effects of inadequate sleep

Sleep deprivation can adversely affect different aspects of your health in the following ways:

1. Affects memory and brain function

Your brain needs you to sleep so it can work better. It is only when you fall into deep slumber that your brain is able to build memory.

When you are learning a new skill or studying for an exam, make sure you get enough sleep afterwards so that your brain is able to preserve or store new information in the form of memory. (4)

2. Affects heart health

lack of sleep can be harmful for heart health

If you don’t sleep well, your body does not get any time to rest and recuperate.

A constantly active body puts relentless pressure on the heart, which can lead to cardiovascular damage. This can pave the way for a heart attack or congestive heart failure. (5)

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3. Weakens immunity

When you don’t sleep well, the level of stress hormone inside your body spikes. This stress hormone called cortisol works the same way as a steroid shot given after an allergic reaction – it curbs the body’s immune response to minimize inflammation. (6)

But in the absence of an allergic reaction, the spike in cortisol only inhibits the body’s ability to fight infections. (6)

4. Causes depression

If you don’t go into deep sleep, your body will not be able to produce enough of the happy hormone (serotonin). (7) So, you will be more irritated and depressed. This also explains why some antidepressants tend to make you sleepy.

5. Contributes to weight gain

insufficient sleep can lead to weight gain

Lack of sleep increases the level of stress hormone (cortisol) in the body, making you crave sugar and carbohydrates. High intake of sugar and carbs, in turn, makes you gain weight while also increasing the risk of diabetes. (8)

6. Increases risk of diabetes

The constant elevation of stress hormone due to lack of sleep is similar to taking a high dose of steroids all the time. This will make you feel constantly hungry and will urge you to eat more carbs.

Excessive consumption of carbs and sugars can damage your pancreas and, thereby, lead to the onset of diabetes. (9)

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7. Leads to fatigue-related incidences

If you are not sleeping well, your body will get exhausted from the lack of recovery period. Your energy will be depleted because of the constant stress condition your body lives in. (10)

8. Kills sex drive

Lack of sleep can cause severe hormonal imbalance, affecting your sex hormone and thereby hampering your sex drive. As a result, you will find yourself less interested in sexual activity and generally more irritable. (11)

9. Other problems

Sleep deprivation can lead to memory trouble, increase your cancer risk, and heighten your susceptibility to early death by compromising your overall health. (12)

How Many Hours Should an Adult Sleep During the Night?

Every individual is different, and each one may need a little more or a little less sleep to recharge. (13) But generally speaking, adults are recommended to get at least 6–8 hours of sleep every night.

What Medical Conditions Can Cause Insomnia?

Many medical, physical, and mental conditions can cause insomnia, such as restless leg syndrome, heart failure, sleep apnea (obstructive or central), anxiety, jet lag, and irregular work hours. (14)

How Is Insomnia Treated?

how to treat insomnia?

Your doctor will evaluate your medical history and symptoms, ask you relevant questions, and examine you to identify the root cause of your insomnia so that it can be treated accordingly.

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The doctor may prescribe sedatives and sleeping aids if needed, but these medications do not address the underlying cause of insomnia and are not meant for long-term use. In fact, too much reliance on these can make the problem worse later on.

Your body will gradually develop resistance and require higher and higher dosages over time, which can have adverse side effects. Therefore, the focus of treatment should be on behavioral and lifestyle changes that aim to foster good sleep hygiene and build a steady sleep routine.

Here are some commonly recommended measures to help treat insomnia: 

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  • Stick to a consistent sleep schedule.
  • Avoid caffeinated or alcoholic drinks after 4 pm.
  • Keep your bedroom for sleep and sex only.
  • Don’t work out right before bed.
  • Try to avoid any stressful conversations, phone calls, or meetings right before bed
  • Don’t force yourself to sleep if you are not sleepy.
  • Have a routine ritual for your sleep, and be mentally prepared for it.
  • Dim the lights, brush your teeth, and turn off the TV and your smartphone to create a conducive ambiance for sleep.
  • Read a book, pray, or meditate before going to bed as this will help relax your mind so that you fall asleep more easily.

How Is Insomnia Diagnosed?

how is insomnia diagnosed?

Insomnia has many causes and types. Your doctor will start off by determining the type of insomnia you may have. To that end, he/she will ask if you have difficulty falling asleep or you have trouble staying asleep?

You may have difficulty falling asleep if:

  • You are stressed out.
  • You are thinking too much.
  • You drink too much caffeine during the day.
  • You work out right before going to bed. (15)

If you have trouble staying asleep, then your doctor needs to ask you more questions about your breathing, snoring, frequency of using the bathroom at night, etc. These are some of the commonly asked questions:

  • Do you have any pain that wakes you in the middle of the night?
  • Do you have intrusive thoughts and ideas that keep your mind racing?
  • Do you wake up in terror from nightmares or screaming?
  • Is your room too hot, too cold, too noisy, or too bright?
  • Do you have a TV in your bedroom that stays on late in the night?
  • What medication do you take? Are you taking any herbal or over-the-counter medication to help you lose weight or detox?

Final Word

Overcoming insomnia or other sleeping disorders requires consistent effort. It is a problem that sets in over time and goes away over time, but you must be committed to the treatment plan.

If you haven’t had a good night’s sleep in months, don’t expect the problem to resolve overnight. You may be doing everything right, but it will take weeks for your body to get accustomed to the newly adopted sleep schedule and practices.

Slowly but steadily, you will start to notice an improvement in the quality and quantity of your sleep. Be patient, don’t give up, and stay the course.

References
  1. Medic G, Wille M, Hemels ME. Short- and long-term health consequences of sleep disruption. Nature and science of sleep. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449130/. Published May 19, 2017.
  2. Besedovsky L, Lange T, Haack M. The sleep-immune crosstalk in health and disease. Physiological reviews. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6689741/. Published July 1, 2019.
  3. Díaz-Negrillo A. Influence of sleep and sleep deprivation on ictal and interictal epileptiform activity. Epilepsy research and treatment. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3694483/. Published 2013.
  4. Eugene AR, Masiak J. The neuroprotective aspects of sleep. MEDtube science. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4651462/. Published March 2015.
  5. Colten HR. Extent and health consequences of chronic sleep loss and sleep disorders. Sleep Disorders and Sleep Deprivation: An Unmet Public Health Problem. https://www.ncbi.nlm.nih.gov/books/NBK19961/. Published January 1, 1970.
  6. Hirotsu C, Tufik S, Andersen ML. Interactions between sleep, stress, and metabolism: From physiological to pathological conditions. Sleep science (Sao Paulo, Brazil). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4688585/. Published November 2015.
  7. Leproult R, Van Cauter E. Role of sleep and sleep loss in hormonal release and metabolism. Endocrine development. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3065172/. Published 2010.
  8. Beccuti G, Pannain S. Sleep and Obesity. Current opinion in clinical nutrition and metabolic care. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3632337/. Published July 2011.
  9. Wong H, Singh J, Go RM, Ahluwalia N, Guerrero-Go MA. The effects of mental stress on non-insulin-dependent diabetes: Determining the relationship between catecholamine and adrenergic signals from stress, anxiety, and depression on the physiological changes in the pancreatic hormone secretion. Cureus. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6710489/. Published August 24, 2019.
  10. Engle-Friedman M. The effects of sleep loss on capacity and effort. Sleep science (Sao Paulo, Brazil). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4608917/. Published December 2014.
  11. Wittert G. The relationship between sleep disorders and testosterone in men. Asian journal of andrology. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3955336/. Published 2014.
  12. Chattu VK, Manzar MD, Kumary S, Burman D, Spence DW, Pandi-Perumal SR. The global problem of insufficient sleep and its serious public health implications. Healthcare (Basel, Switzerland). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473877/. Published December 20, 2018.
  13. Chaput J-P, Dutil C, Sampasa-Kanyinga H. Sleeping hours: What is the ideal number and how does age impact this? Nature and science of sleep. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6267703/. Published November 27, 2018.
  14. Suzuki K, Miyamoto M, Hirata K. Sleep disorders in the elderly: Diagnosis and management. Journal of general and family medicine. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5689397/. Published March 30, 2017.
  15. O’Callaghan F, Muurlink O, Reid N. Effects of caffeine on sleep quality and daytime functioning. Risk management and healthcare policy. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6292246/. Published December 7, 2018.
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