In clinical practice, a diagnosis of hypomenorrhea is made if the menstrual volume is less than 20ml. Clinically, treatment should be based on the cause of low menstrual flow. If the uterus is abnormally developed and the uterus is small, the relative endometrium will be less, and the shed endometrium will cause less bleeding, so the menstrual flow will also be less, which can be treated clinically with oral supplementation of Glaxo. If the low menstrual flow is caused by polycystic ovary syndrome and high androgens, you can actively treat polycystic ovary syndrome, such as lowering androgens first, and then giving supplementation and progesterone artificial cycle for treatment. If the low menstrual flow is caused by incomplete adhesion of the uterine cavity due to endometrial damage after abortion, hysteroscopy is needed to separate the adhering tissues in order to change the situation of low menstrual flow.