Menstruation is a physiological phenomenon unique to women and is associated with them monthly from puberty until menopause. Menstruation should be regular for most of a woman’s reproductive life, except for the immaturity of the hypothalamic-pituitary-gonadal axis at menarche and the decline of ovarian function during menopause. Normal menstruation should be a cycle of 28 to 30 days, with a period of 5 to 7 days, and the volume of menstruation should be about 30 ml to 100 ml. Any menstrual volume and interval different from the normal menstrual cycle are considered menstrual disorders. The common types are excessive menstruation, scanty menstruation, frequent menstruation and scanty menstruation. Menstrual disorders are one of the most common symptoms of women’s diseases. Menstrual disorders are also an important cause of infertility. There are two major causes of menstrual disorders: 1. neuroendocrine dysfunction: mainly due to unstable or defective function of hypothalamic-pituitary-ovarian axis, such as hyperprolactinemia, polycystic ovary syndrome, amenorrhea, gonorrhea, etc. 2. 2, organic lesions, drugs or mental factors. Such as the use of drugs for psychiatric treatment; oral contraceptives and other endocrine agents or intrauterine device contraception may occur menstrual disorders.