It is normal for menstruation to be delayed by 5 to 7 days every month. The first day of menstrual bleeding is the beginning of the menstrual cycle, and the time between the first day of two menstrual periods is called the menstrual cycle. In clinical practice, the normal menstrual cycle is 21-35 days, with an average of 28 days, and it is normal for menstruation to be 1 week early or 1 week late. Therefore, it is normal for menstruation to be delayed for 5 to 7 days every month and no special treatment is needed. Every woman’s menstrual cycle is different in length and can be advanced or delayed due to environmental factors, and if it is advanced or delayed by more than 1 week, it is an abnormal phenomenon. If the menstrual cycle is abnormal, it is recommended to consult a doctor in a timely manner to identify the cause of the problem and follow the doctor’s instructions for the right treatment.