45 years old suddenly do not menstruation to first understand the reasons and then determine whether the need to adjust, such as pregnancy, whether it is perimenopausal or the existence of disease factors, if it is disease-induced menopause to be treated. 1. usually have sex and not contraceptive women, pregnancy is one of the main manifestations of menopause, which is a physiological phenomenon, menstruation does not come do not need special to regulate. 2. Women aged 45 to 55 years old will enter the menopause stage, enter the menopause after the ovarian function decline, the body’s estrogen and progesterone levels are disturbed, which will lead to women’s menstruation suddenly do not come, this is a physiological change, there is no accompanying other physical discomfort symptoms, no special to adjust. 3. Excluding physiological reasons, menstruation is not caused by diseases. (1) For example, if you have had several abortions or uterine cavity adhesion after uterine cavity operation, it will lead to lack of menstruation in serious cases, and you may not need to treat it if you don’t have any fertility requirements. (2) Some women have endocrine disorders that lead to menstrual failure, such as decreased ovarian reserve function, failure to ovulate, or the presence of hyperprolactinemia or thyroid disease, etc. Under the guidance of the doctor, symptomatic treatment, such as estrogen and progesterone to adjust the cycle, oral bromocriptine, etc., to address the different factors, the treatment is different. There are many reasons why menstruation may not occur at the age of 45, so it is advisable to go to the hospital to clarify the cause of the problem and treat the symptoms under the guidance of the doctor.