According to the normal work schedule, not going to bed beyond 11:00 p.m. is generally considered to be staying up late. According to the normal adult day 7 ~ 8 hours of sleep time projection, between 9:00 pm to 10:30 pm is the best time to arrange sleep, therefore, if more than 11:00 pm has not gone to sleep for the late night. It is recommended that you adopt a regular routine and try to avoid staying up late. Staying up late is damaging to your health. Poor mental health after staying up late can be detrimental to your daily life the next day, affecting your work or study efficiency. Long-term stay up late may also cause kidney function damage, neurasthenia, and in severe cases can also cause depression and so on. Most of the hormones, such as human adrenocorticotropic hormone and growth hormone is mainly secreted at night during sleep, can promote sugar metabolism in the body, so that muscle development, so that the growth and development of human beings to slow down aging. So usually not often stay up late, regular rest and relaxation, to avoid affecting the health of the body.