Generally for normal people, going to sleep after 11:00 at night belongs to stay up late. Modern clinical medicine believes that from 11 o’clock at night to 1 o’clock in the morning of the next day, this period of time is often the body in the stage of self-repair. If the person has not yet gone to sleep within that time period, it is mostly regarded as staying up late. If at night 11:00 to 1:00 a.m. the next day within the time period has not yet gone to sleep, so that the body’s functions are still in operation, will not be able to self-repair, prone to the second day of poor mental health, poor concentration, but also affects the normal study and work. If the continuity of long-term stay up late, may also aggravate the patient’s internal organs burden, easy to cause liver disease, cardiovascular disease and so on. Therefore, for the sake of one’s own health, it is recommended to go to bed earlier and try to sleep before 11 o’clock at night to avoid affecting the health of the skin as well as internal organs. Only by ensuring that you have enough sleep can you help maintain the health of your body’s various systems, and also help maintain a better mental state.