Auntie generally refers to menstruation. Suddenly heavy menstruation may be caused by endocrine abnormality, genital organic lesions, medication factors and so on. 1. Endocrine abnormality: When life is too stressful or life and diet are irregular, it may lead to endocrine influence, abnormal sex hormone levels, and sudden increase in menstrual flow and prolonged menstrual period. 2. Organic genital lesions: when women suffer from diseases such as adenomyosis, endometrial cancer, cervical cancer, etc., it may also lead to abnormal bleeding from the uterus, accompanied by symptoms such as lower abdominal pain, abnormal vaginal discharge, etc., which is mistaken as a symptom of sudden increase in menstrual flow. 3. Drug factors: some women take emergency contraceptive pills or levonorgestrel, dydrogesterone and other sex hormone drugs, which will lead to withdrawal bleeding, often manifested as a sudden increase in menstrual flow. Clinically, when a woman has a sudden increase in the amount of menstruation, it is recommended that she consult a doctor in a timely manner, improve the blood routine, ultrasound, blood human chorionic gonadotropin (HCG) and other related examinations, and actively deal with under the guidance of a specialist.