Clinically, menorrhagia is diagnosed if the menstrual volume is less than 30 ml. Then there are several causes of menorrhagia: 1. Repeated scraping, multiple abortions, causing damage to the endometrium, causing partial adhesion of the uterine cavity causing menorrhagia. 2. 2, excessive dieting, women’s menstruation and weight and body fat content is greatly related, excessive dieting can make menstruation reduced. 3, endocrine disorders, work intensity, irregular life, if not relaxed mood can reduce menstrual flow 4, ovarian dysfunction. Ovarian function directly affects women’s menstruation. 5, polycystic ovary syndrome, hyperprolactinemia, high androgens, can reduce menstruation 6, oral contraceptives. Thin endometrium, reduced menstrual flow What are the dangers of low menstrual flow 1. Due to low menstrual flow and thin endometrium, fertilized eggs cannot be laid, leading to infertility 2. High androgens, performance of facial acne. Some serious hair loss, seriously affecting the beauty of women’s menstruation treatment 1, the first cavity adhesions can be done 3-7 days after the clean menstruation hysteroscopy, separation of adhesions, oral supplementation JiaLuo 3 months after the operation, at the same time to prevent adhesions in the second on the birth control ring 1, 3 months after the removal of the ring 2, regular life, do not stay up late. Maintain a comfortable mood 3, stop taking birth control pills. Change to other methods of contraception 4.Actively treat polycystic ovary syndrome