Fifty-one years old menstruation does not come for more than a month if there is no abnormality in the body can be observed, do not need special adjustment. The average age of menopause for women in China is 49.5 years old, with 80% between 44 and 54 years old. 51 years old belongs to the perimenopausal period, which is a stage when not only the menstrual cycle will be abnormal due to the gradual decline of ovarian function and the decrease of estrogen level, but also the phenomena of anovulatory menstruation, amenorrhea, or irregular menstrual cycle, and the menopausal syndromes such as hot flashes, sweating, unstable mood, or irritable insomnia, may also occur. Fifty-one year old women who do not have abnormal uterine bleeding usually do not need to be treated. When women enter the perimenopause, they need to maintain a good mood, not be too nervous, live a regular life, don’t stay up too late, and eat nutritious and light meals, reducing the amount of oily and stimulating foods. Participate in outdoor activities more often. If abnormal vaginal bleeding or other obvious discomfort symptoms occur, you need to seek medical attention, diagnosis and treatment under the guidance of a doctor.