Estrogen is mainly secreted by the ovaries and its main function is to stimulate the development of female sexual organs and the appearance of female secondary sexual characteristics, and to maintain their normal state. When the estrogen level is low, a series of symptoms will appear in the body, and the symptoms of menopause are caused by the gradual decrease of estrogen. 1. Changes in the appearance of the whole body: dry hair and hair loss, dry, loose and yellow skin, pigmentation, sagging and shrinking breasts, accumulation of abdominal fat, and easy aging. 2, low menstrual volume, prolonged menstrual period and other symptoms of irregular menstruation, and even amenorrhea, affecting fertility. Sexual life is difficult and sexual apathy occurs. 3.The body appears subhealthy, such as dizziness, headache, fatigue and weakness, back pain, symptoms of osteoporosis, memory loss, palpitations, blood pressure fluctuations, and the urinary system is prone to infection. 4. Frequent insomnia, anxiety, irritability, easily depressed mood, serious patients even have suicidal tendencies. 5.Low estrogen level affects lipid metabolism, decreases high-density lipoprotein and increases low-density lipoprotein, which increases the incidence of atherosclerosis and coronary heart disease, and also leads to obesity. Low estrogen levels affect women’s physiology, fertility and health, and must be taken seriously. It is recommended to go to the hospital in time to identify the causes and carry out symptomatic treatment under the guidance of a doctor.