Nearly all people are convinced that they need to sleep for 8 hours. But that’s not a correct information. Every person has unique physiological characteristics and if 8 hours is enough for someone, for the other it can be less than enough. We shouldn’t blame the person who sleeps late and wakes up late, because that’s how they sleep well. We know that the reason why we become sleepy is the increased melatonin in our body. There are people whose melatonin increase occurs late and that’s why they sleep late.
As we learned from the latter passage, every person has a unique sleep schedule, but also some people have problems with sleeping. There can be various causes for this. For example, the person may be really stressed and not able to sleep, because he is thinking about various things. Or the person hasn’t adjusted his sleep schedule and has irregular sleeping patterns. There are people whose organisms don’t produce enough melatonin, and the body doesn’t understand that it needs to sleep. The people who don’t get enough sleep get sleep deprivation.
Sleep deprivation can cause many effects. Sleep deprivation is associated with an increased risk of both cognitive decline and dementia. Sleep deprivation is also highly connected with mental health disorders such as anxiety and depression. Sleep is closely connected to emotional regulation.
While you sleep, your immune system produces protective, infection-fighting substances like antibodies and cytokines. It uses these substances to combat foreign invaders such as bacteria and viruses. Sleep deprivation prevents your immune system from building up its forces. If you don’t get enough sleep, your body may not be able to fend off invaders, and it may also take you longer to recover from illness.
https://www.healthline.com/health/sleep-deprivation/effects-on-body#effects
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