Because 65438+ 0: 00 am to 4: 00 am is the time when most organs of the human body work slowly or stop working, and it is the time for full rest, muscles are completely relaxed, and blood pressure, blood supply to the brain and pulse will gradually decrease.

It will cause many kinds of harm to the body: frequent fatigue and decreased immunity. If people often stay up late, the most serious sequelae are fatigue and listlessness; The body's immunity will also decline. Symptoms of autonomic nervous disorders, such as colds, gastrointestinal infections, allergens, etc.

The time from 1 1 to 3 am is beauty time, that is, the time when the human body's meridians run to the gallbladder and liver meridians. If these two organs don't get enough rest, they will appear on the skin, which is prone to rough, yellow, black spots, acne and other problems. Moreover, to make matters worse, in the long run, there will be neuropsychiatric symptoms such as insomnia, forgetfulness, irritability and anxiety.