Night is the body to eliminate toxins, relieve stress, the brain to get sufficient rest, the time to accumulate energy. At this time to settle into the best sleep, or stay up late will make health suffer a great threat, as follows: 1, dry and rough skin, usually said to sleep “beauty sleep”, that is, good skin is nourished by adequate sleep, women who stay up late for a long time, can not regular rest, the body’s endocrine system and nervous system will be damaged, the secretion of female hormones will be abnormal, the skin is getting worse. 2, menstrual disorders, causing women’s menstrual disorders for many reasons, staying up late is one of the important reasons, staying up late so that the body does not get enough rest, so that the original biological clock is disrupted, and then a series of symptoms of endocrine disorders, affecting women’s ovulation, so that menstrual disorders. 3, the formation of dark circles under the eyes The formation of dark circles, bags under the eyes, long-term late night will be overworked, resulting in poor blood circulation around the eyes, causing dark circles, bags or white eyes covered with blood.