The sudden increase in menstrual flow at the age of 47 may be caused by endometriosis, and may also be caused by organic pathology or perimenopausal syndrome. 1. endometriosis: patients with endometriosis may have heavy menstrual flow, irregular vaginal bleeding, leukorrhea and other symptoms, patients with abnormally high menstrual flow should be alert to the possibility of endometriosis, you can go to the hospital to do diagnostic curettage or hysteroscopy for pathological diagnosis, and according to the results of the symptomatic treatment. 2. Organic diseases: If the patient has submucous fibroid or adenomyosis in the uterus in the past, these may lead to increased menstrual flow. 3. Perimenopausal syndrome: at this time, the patient’s ovarian endocrine function declines, and anovulatory dysfunctional uterine bleeding will occur. If any of the above symptoms occur, it is recommended to go to the hospital in time for early and regular treatment.