Staying up late will be detrimental

Staying up late will be detrimental to human health, because the adrenal cortex hormone and growth hormone are all secreted during the night when people are sleeping. The former is secreted before dawn, which can promote the metabolism of carbohydrate in human body, and protect the development of muscle; while the latter is produced only after sleep, which can not only promote the growth and development of young people, but also can delay the aging process of the elderly.As a result, staying up late will cause a variety of harms to human body. First, frequent fatigue and decreased immunity.The most serious sequence caused by staying up late is fatigue and lack of energy. The immunity of human body will decrease accordingly. And some other symptoms such as cold, allergies will also appear. Second, headache.The next day after staying up late, you will suffer from headache when you are at work or at class. You will be unable to concentrate. What's more, long-term staying up late and insomnia will also bring invisible damage to our memory. Third, long-term staying up late will slowly cause some psychiatric symptoms such as insomnia, forgetfulness, irritability, anxiety and so on.。 There are also other harms caused by staying up late, such as poor eyesight or dysfunction of the liver.What'smore, sleep deprivation may raise the risk of getting Alzheimer's disease. We should pay special attention to these bad effects, and try not to stay up late at night.