Clearly not pregnant but suddenly appear menopause symptoms, may be the case of amenorrhea, amenorrhea causes more, mainly including mental, lifestyle, disease, etc., the details and treatment are as follows: 1, mental factors: long-term mental depression, tension, anxiety, or environmental changes, overwork and other factors, will temporarily affect the hypothalamus function, resulting in menopause, usually in the lifting of mental factors or 2, lifestyle: excessive exercise, overeating or excessive dieting, smoking, alcohol abuse and staying up late and other bad habits can interfere with the normal level and function of hormones in the body, leading to menopause. The symptoms can be relieved by adjusting the lifestyle, eating more fresh fruits and vegetables, exercising properly and getting enough sleep. 3, drug factors: If you take various contraceptives for a long time, which affect the hormone level in your body, it may lead to menstrual disorders and cause menopause, you can restore the normal menstrual cycle through hormone therapy under the guidance of a doctor, for example, if you have a thick endometrium, you can give progestin-like drugs to promote menstruation. 4, disease factors: polycystic ovaries are a very common problem. Diseases such as polycystic ovary syndrome, uterine adhesions and premature ovarian failure can cause menstrual scarcity, reduced menstrual flow and amenorrhea. Chronic wasting diseases such as chronic hepatitis, blood disorders and abnormal thyroid function may also cause amenorrhea, and the cause can be clarified by perfecting relevant examinations and applying medications or surgical methods for symptomatic treatment under the guidance of doctors. For example, hysteroscopic separation of uterine adhesions can be performed under direct vision, and hypothyroidism causing menorrhagia can be treated with thyroxine.