Low menstrual flow at the age of 46 may be related to physiological factors or pathological factors, if in a pathological state need to be regulated and treated. 1. Physiological factors: for 46-year-old women, at this time has almost entered the perimenopause, so at this time there will be menstrual irregularities, such as low menstrual flow, heavy menstruation, scanty menstruation and other symptoms, if it is not accompanied by other undesirable manifestations, it may be a normal physiological phenomenon, generally do not need special treatment. 2. Pathological factors: 46-year-old women with low menstrual flow can not be ruled out and disease factors, such as in the case of malnutrition, will cause low menstrual flow, need to be adjusted in the diet. There may also exist diseases such as uterine fibroids, endometrial polyps, hyperthyroidism and so on, which cause low menstrual flow, and should cooperate with the doctor for surgical treatment. Whether the 46-year-old low menstrual flow needs to be regulated should be judged according to the specific causes.