Men and women of childbearing age, if they often stay up late, will affect the activity and number of male spermatozoa; will also affect the secretion of female hormones and the quality of eggs, but also easily affect the menstrual cycle.

　　What are the disadvantages of staying up late?

　　Staying up late can damage your health. Because, human adrenocorticotropic hormone and growth hormone are secreted at night during sleep. The former is secreted before dawn, with the promotion of human sugar metabolism, to ensure the function of muscle development; the latter is produced only after sleep, both to promote the growth and development of young people, but also to slow down the aging of middle-aged and elderly people.

　　Frequent fatigue, decreased immunity

　　People often stay up late caused by the aftermath of the most serious is fatigue, mental instability; the body's immunity will follow the decline in colds, gastrointestinal infections, allergies and other symptoms of autonomic nervous disorders will appear.

　　Headache

　　The day after you stay up late, you will often have a headache when you go to work or class, you can't concentrate, and you may even have a headache. Long-term staying up late and insomnia also have invisible damage to your memory.

　　Dry skin, dark spots and acne

　　11 p.m. to 3 a.m. the next day is the beauty time, but also the body's meridians run to the gallbladder and liver time. If these two organs do not get enough rest, it will show on the skin, which is prone to roughness, yellowish colour, dark spots and acne. For those who are used to going to bed early, the latest time to go into a deep sleep is at 1 a.m., the time to nourish the liver. And, what's worse, staying up late for a long time will slowly lead to insomnia, forgetfulness, irritability, anxiety and other neurological and mental symptoms.

　　Dark circles and bags under the eyes

　　Night is the body's physiological rest time, the rest and no rest, it will be due to the transition of fatigue, resulting in poor blood circulation around the eyes, causing dark circles, bags under the eyes or white eyeballs covered with blood.

　　Impact on Fertility

　　Men and women of childbearing age, if you often stay up late, will affect the activity and number of male spermatozoa; will also affect the secretion of female hormones and the quality of the eggs, but also easily affect the menstrual cycle.

　　Increased risk of chronic diseases

　　Adrenaline and other hormone secretion of people who stay up late is also higher than the average person, so that the metabolic pressure increases, which in turn produces chronic diseases such as hypertension, diabetes and so on.

　　Liver function

　　People who stay up late have a higher percentage of abnormal liver function than the general population.

　　Vision is most at risk

　　It is recommended that for every hour of staying up late (after 23:00), do eye exercises. Otherwise the consequences are serious. Be sure to pay attention, with glasses is very painful. If you stay up late for a long time, you will more slowly develop insomnia, forgetfulness, irritability, anxiety and other neurological and mental symptoms. Overwork makes the body's nervous system dysfunction, causing imbalances in the body's major organs and systems, such as the occurrence of cardiac arrhythmia, endocrine disorders, etc., serious will lead to the whole body's state of stress, the chances of infection and disease correspondingly increased.