Staying up late may lead to delayed menstruation. Women’s menstruation is mainly affected by estrogen and progesterone in the body, causing the endometrium to peel off and mix with the blood flowing out of the vagina, while staying up late will lead to endocrine imbalance in the ovaries, causing disruption of the secretion of estrogen and progesterone, which may lead to the delayed menstrual cycle, or even amenorrhea. In addition, delayed menstruation may also be caused by pregnancy, anemia, and excessive dieting. Patients can use early pregnancy test paper to test, or can go to the hospital to do uterine ultrasound, as well as blood HCG, hormone six tests, etc., to determine the cause of delayed menstruation, such as pregnancy, patients should be clear about the location of the pregnancy and the growth of the embryo, if delayed menstruation due to anemia, the patient should be followed by the doctor’s instructions to supplement the iron or Colla Corii Asini Oral Liquid, if the patient delayed menstruation due to over-dieting, it should be active to supplement nutrition and stop dieting. If the delayed menstruation is caused by excessive dieting, the patient should actively take nutritional supplements and stop dieting to lose weight. If there is a delay in menstruation caused by staying up late, it is recommended that women try not to stay up late, regular work and rest, develop good habits, relax, relieve stress, can do some physical exercise, work and rest, ensure sufficient sleep, can effectively relieve the situation of delayed menstruation.