Women in their 50s who stop menstruation for half a year and then have menstruation have more reasons, which may be caused by the decline of ovarian function; it may also be caused by gynecological inflammation, gynecological tumors and other abnormalities. 1. Decline in ovarian function: women in their 50s are in perimenopause, at this time, the function of the ovary has not been completely degraded, resulting in menstrual disorders, which is mostly a normal physiological process. 2. Gynecological inflammation: in perimenopause, gynecological inflammation is easy to occur, if pathogenic microorganisms invade the uterus, ovaries, cervix and other inflammation, also easy to cause vaginal bleeding. 3. Gynecological tumor: It should be noted that if menstruation occurs again after the real menopause, it is also necessary to consider whether there is the possibility of malignant tumor, such as ovarian cancer, endometrial cancer, cervical cancer and other diseases. It can be seen that women in their 50s who stop menstruating for half a year and then have menstruation again may or may not be normal, and it is recommended that the patient consult a doctor in time, improve the relevant examinations, clarify the cause of the disease under the guidance of a professional doctor, and target treatment.