The delay in menstruation for almost a month is related to the following factors: 1) absence of menstruation due to pregnancy; 2) absence of menstruation due to ovarian decline, which can lead to menopause; 3) endocrine disorders; 4) polycystic ovary syndrome; 5) pelvic tuberculosis; 6) pelvic tumors; 7) uterine adhesions. Patients are advised to rule out the possibility of pregnancy first and then do other tests to understand whether it is caused by the above-mentioned reasons, which must be combined with the clinical history and the corresponding symptoms of the patient to determine before the medication can be given. Women should develop good habits in their daily life, otherwise it will cause endocrine disorders and cause menopause.