It is normal for menstruation to be delayed by less than 1 week per month. Under normal circumstances, it is normal for menstruation to occur 1 week earlier or 1 week later each month. If a woman’s body is subjected to mental stress or changes in the environment, or if she is tired, the hormone levels secreted by the ovaries may be advanced or delayed, which may lead to the endometrial lining peeling off earlier or later, resulting in changes in menstruation. If menstruation is advanced or delayed for more than 1 week, it is irregular menstruation, women need to go to the hospital to do ultrasound, sex hormone measurements, if it is hormone level secretion disorders, need to give estrogen and progesterone for cyclic treatment, and women should also pay attention to maintain a regular life, keep the mood calm, and increase the appropriate nutrition, exercise and physical exercise, physical fitness, is also conducive to the adjustment of the menstrual cycle. It is also conducive to the adjustment of the menstrual cycle.