The particularly heavy menstrual flow at the age of fifty may be caused by anovulatory dysfunctional uterine bleeding, or it may be caused by uterine fibroids, or it may be caused by endometrial cancer. 1. Anovulatory dysfunctional uterine bleeding: anovulatory dysfunctional uterine bleeding is a kind of abnormal uterine bleeding due to the dysfunction of reproductive endocrine axis, which can lead to the symptom of unusually heavy menstrual flow in women in their fifties. 2. Uterine fibroid: uterine fibroid is a kind of benign tumor formed by the proliferation of uterine smooth muscle tissue, which can also lead to the symptom of particularly heavy menstruation in fifty-year-old women, and in addition, patients may have leucorrhoea increase, lower abdominal distension and pain, frequency of urination, urgency of urination, constipation and other symptoms. 3. Endometrial cancer: endometrial cancer is a group of epithelial malignant tumors occurring in the endometrium, which can also lead to the symptom of particularly heavy menstrual flow in fifty-year-old women, and in addition, patients can have the symptoms of abnormal vaginal discharge, lower abdominal distension and pain, anemia, emaciation and so on. In addition to the above diseases, other causes may also lead to the symptoms of unusually heavy menstrual flow at the age of fifty, it is recommended to consult a doctor in time to identify the cause and ask the doctor to deal with it.