Staying up late for a long time is more harmful to the human body, both men and women should avoid staying up late for a long time. Because staying up all night the body has been in a working, consuming state, it takes longer to repair, which will reduce the body’s immunity. Girls stay up late after the body of the gastric acid will be excessive secretion, thus causing stomach pain, stomach acid situation, or even gastritis, gastric ulcer. In addition to staying up late on the skin harm is more obvious, especially for women harm is more heavy, because after a long time to stay up late will lead to a variety of skin pigmentation, wrinkles, skin will become dry. In addition, for women, staying up late may cause endocrine disorders, and even sexual dysfunction, so female comrades should avoid staying up late for a long time.