Functional uterine bleeding is the most common gynecological condition. Because the clinical symptom of functional uterine bleeding is excessive menstrual flow, it is the reason why patients seek medical attention. However, when many doctors see patients with excessive menstrual flow, the first diagnosis they think of is “functional uterine bleeding”, and they think that “functional uterine bleeding” can be solved by giving hemostatic drugs. As a result, “functional uterine bleeding” often remains untreated for a long time and patients are very troubled. If you are a patient and you see that your doctor has written in the diagnosis column of your medical record: functional uterine bleeding, and then look at the medicine prescribed by your doctor, can you know the cause of your disease and can you know that the medicine prescribed by your doctor can cure your “functional uterine bleeding”? Here are some questions about functional uterine bleeding: What is functional uterine bleeding? First of all, let’s start with menstruation. Why do women have menstruation about once a month after the beginning of puberty? This is because the physiological characteristics of the female reproductive endocrine system change cyclically, that is, the neuroendocrine system changes cyclically. The neuroendocrine system is the hypothalamus-pituitary-ovary under the direct control of the cerebral cortex, which is medically considered to be connected to an axis called the hypothalamus-pituitary-ovary axis. The target organ (organ of action) regulated by this axis is the uterus (the endometrium to be precise). After puberty begins, the uterus receives cyclic stimulation from ovarian hormones, producing cyclic bleeding. This cyclic uterine bleeding (menstruation) gradually stabilizes, and this performance marks the woman’s maturation into the reproductive age. In clinical practice, the normal menstrual cycle is considered to be 28-32 days, the period is 3-7 days, and the average volume of menstruation is between 80 ml, usually not exceeding 100 ml. The menstrual cycle is a normal physiological phenomenon for women. Generally, women do not have much discomfort during menstruation that affects their normal life and work. As the pelvic organs are congested during menstruation, it can produce the feeling of lower abdominal cramps and lumbosacral i distension. A disease is formed once there is a significant abnormality in the menstrual cycle, period, volume and symptoms (such as a large amount of blood clots, etc.). It must be diagnosed as functional uterine bleeding, or gonorrhea, only after a doctor has conducted a comprehensive and careful examination to exclude abnormal uterine bleeding caused by organic diseases of the body and reproductive system. In other words, functional hemorrhage is defined as abnormal uterine bleeding caused by malfunction of the neuroendocrine mechanisms regulating reproduction, without the presence of organic pathologies of the body and reproductive organs. It is mainly seen in adolescence and menopausal transition (perimenopause), but also occurs in some women of childbearing age. It can manifest as excessive bleeding, prolonged bleeding or short intervals. It can cause anemia, secondary infections, infertility, etc. causing great mental burden to the patient. The cause of gonadotropin or ovarian hormone release or regulation is dysregulation. Many internal and external factors such as mental stress, fear, sadness, environmental and climatic changes, as well as malnutrition, anemia, and metabolic disorders can also affect the synthesis, functioning, and effects of hormones on target organs and lead to menstrual disorders. In order to facilitate the doctor’s choice of treatment, menstrual disorders are divided into anovulatory and ovulatory types of menstrual disorders.